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From the Resene Paint Experts Q&A

Do you have questions about paint or painting? Browse through this Q&A for help with your own projects.

Always make sure you read the product label and data sheet prior to application. If in doubt about any aspect of your project, please ask our Paint Expert for help or come in and see our staff at your local Resene ColorShop or Reseller.



Q. I am considering using your products for my house. Could you advise whether all the ingredients and materials for your paints are either obtained in New Zealand, or whether Resene subscribes to a modern slavery policy of some sort?

A. Resene does follow policies on modern slavery as our raw ingredients come from overseas. We are in the process of scripting these, so I do not have any to attach for you to view but we do ensure we use ethical suppliers.

Resene paints are manufactured in Wellington, New Zealand and is a family owned and run business.

September 2023

Q. I have an old can of waterbased paint that has been unopened since I bought it. The paint colour and consistency seem fine. Is there any risk with using this paint in an interior application and if so, what is the risk?

A. This should be fine to use especially since it was unopened. The first warning sign is a bad smell, like a rotting smell that is very strong and the consistency would be very thick and lumpy.

August 2023

Q. Can I apply Resene Enamacryl as a topcoat over Resene Lustacryl?

A. Yes, Resene Enamacryl is fine to be applied directly over Resene Lustacryl.

July 2023

Q. What paint do I use to re-do gold lettering on a granite headstone? Also, do I use a sealer?

A. We have used the following for the purpose you have requested. Ensure the lettering is clean from all contaminants then re-apply the colour using Resene Lumbersider Low Sheen (testpot) tinted to the correct basecoat for your metallic colour. Using a sharp blade, remove areas outside of the lettering. Followed by Resene FX Metallic (testpot) in your chosen colour. If the original lettering is in good condition you can just apply the Resene FX Metallic over the top.

July 2023

Q. I have some old machinery (a lathe for example) I plan to repaint. It is rusty and still partially painted but I'm hoping/planning to bring it back to bare metal before repainting. It will be subject to quite a bit of wear and tear as well as oils and other things. What can you recommend for this application and are there budget friendly options too?

A. The more time you put in the better the result will be. We have two options – one is a single pack option and the other a two pack option.

For both options the steel needs to be fully stripped from any old coatings, rust free and clean.

Option 1 - apply one coat of Resene ArmourX GP Metal Primer (wait 24 hours between coats in colder temps). Apply two coats over any areas if rust was an issue. Apply two coats of Resene Super Gloss in desired colour. This paint system is tough but not as tough as a 2 pack paint system.

Option 2 - apply one coat of Resene Armourcote 221 (wait 24-48 hours before applying the topcoat). Apply two coats of Resene Uracryl 403 in your desired colour (wait 24-48 hours between coats).

The longer you can wait to use the items for both paint systems the better.

July 2023

Q. I have a client with a sheet metal container that is finished with an acrylic enamel (supplied by Mobil box) – can we use Resene Uracryl GraffitiShield on it?

A. Yes, Resene GraffitiShield can be used to overcoat a waterborne enamel as an anti-graffiti coating.

No undercoat is required over the waterborne enamel provided it is clean and the colour you want. Resene Uracryl GraffitiShield is a clear finish.

If you are also looking to change the colour, I would recommend sanding to degloss the current paint surface and then applying Resene Uracryl 800 series, This is a pigmented anti-graffiti coating that we can tint to a large range of Resene colours.

July 2023

Q. Is there a way to tell how long ago a paint was applied?

A. Determining the age of a paint system is very difficult, there are no machines to assist with this unfortunately.

Paint in different conditions will age at a different rate, depending on the north or south sides of the house, near eaves or protected by fencing etc, near vegetation, how close you are to the sea, how often the home is washed and the colour.

The interior will age slightly differently - U.V, moisture as well as the film thickness of the paint when applied has a lot of responsibility for durability and longevity, as well as primers and undercoats used which are responsible for adhesion.

Unfortunately, there is no real way to determine how long a coating has been present for.

July 2023

Q. I have found some ‘strings’ of paint about 5-7cm long that occasionally roll out onto the wall in my paint.

I keep the lid on the bucket as much as I can but was wondering what could this be and how to I change my method to stop it from happening.

I have read online having a spray bottle of water and occasionally spraying in the bucket may help any what I guess is some of clumping or skinning of the paint.

A. Part cans are particularly vulnerable to ‘skinning’. All binders want to start curing on contact with oxygen in the air. When a part filled can is stored, the binder will react with the air in the void in the can and ‘skin’. Ironically the harder the skin the better, as it is easily removed and, more importantly, provides a good air barrier to the paint underneath. (Skinning is naturally more severe when dried paint in the rim of the can precludes the lid from fitting tightly.)

A spray bottle to keep the paint wet is great, provided not too much water is added.

Ultimately the best way is to keep the lid on and the air and sun out and off the wet paint and the bucket it is stored in. Heat and oxygen will start to 'dry’ your paint even in the container.

There is some very useful information on this link.

May 2023

Q. I'm looking for a low sheen paint/stain to spray direct onto a smooth finished timber crate that will not require an undercoat and will then be food safe once dried to allow for produce etc to sit inside.

A. Acrylic paint sticks to itself, especially in warm conditions. This is why windows and doors etc are not painted in acrylic. Overcoating the crates with a coat of waterborne enamel such as Resene Lustacryl semi-gloss will stop this from happening.

When painting any new uncoated crates going forward, a primer will be necessary as waterborne enamels are not self-priming like Resene Lumbersider Low Sheen is. We recommend priming with one coat of Resene Quick Dry followed by two topcoats of Resene Lustacryl in your desired colour.

May 2023

Q. What waterproof paint can I use on corflute signboard?

A. Ensure the corflute is degreased using Resene Paint Prep and Housewash diluted and used to label directions, then apply a primer coat of Resene Quick Dry waterborne primer undercoat and finish with two coats of any Resene waterborne topcoat, chosen to meet the exposure environment/end use.

May 2023

Q. Can I paint a plastic buoy? I don’t know what the plastic is. I want to use it in my garden as a decoration.

A. Without knowing the exact plastic-type, we would recommend doing a trial with the primer before committing to the whole project. Many kinds of plastic are unpaintable and the primer simply won’t stick long term.

We recommend cleaning and sanding the surface, just a light scuff to abrade the surface. Then apply one thin coat of Resene Waterborne Smooth Surface Sealer. Then leave this for three days to start its initial cure. Make sure you prevent water or rain from touching it during this time if possible.

After the three days try to lightly scratch the surface. If stuck you can proceed with any exterior water-based topcoat, like Resene Lustacryl semi-gloss or Resene Lumbersider Low Sheen (this is also the paint used in our testpots, so you are welcome to use those too).

If the sealer can be scratched and lifted after three days then unfortunately the plastic must be an unpaintable material.

May 2023

Q. Can I apply dark wax over Resene Lustacryl paint? Or should I use matte or flat?

A. A low sheen or flat finish is best to use, I'd recommend Resene SpaceCote: Resene SpaceCote Flat or Resene SpaceCote Low Sheen. This is a better surface for the soft wax to adhere to.

May 2023

Q. I want to paint a galvanised flu for a pellet fire. The flu exits the back of the fire, through the wall, and then up. It's the outside part I want to paint. The flu is double skinned but the lower parts still get too hot to touch. What's a suitable paint system for this? I'm having trouble finding info on paints that can stick to galvanising and also cope with heat.

A. We may have a product that can be used, but it depends how hot the flu gets. It’s a flat finish black coating, the entire area needs to reach a temperature of 200 to 250 degrees Celsius and be held at this temp for at least 1 hour to cure. If the flu or parts of don’t reach this temp, this is not an option.

If the flu or parts of it don’t get hot enough for the above product, but it is too hot to hold your hand to it continuously while in use then unfortunately we don’t have a suitable product.

May 2023

Q. Do you have a product that will remove graffiti from a concrete block wall?

A. We have Resene Graffiti Cleaner which removes graffiti easily from non-porous surfaces and can be used to help remove graffiti from porous surfaces but the graffiti can get into small holes and gaps that be tricky to remove if there is no coating already on the concrete.

May 2023

Q. I need an acrylic paint retarder. What product do you have?

A. Resene has Resene Hot Weather Additive that can be added to acrylic or waterborne enamels to slow the drying.

March 2023

Q. Is it OK to use a pale low sheen waterbased topcoat under a waterbased high gloss enamel topcoat of a slightly different colour, when putting on two coats of paint, so you can see where you have painted, and where you haven’t, and to use up surplus paint of a slightly different shade?

A. Yes this is fine to do. On the high gloss last coat be sure to not overspread the paint and be more meticulous with your application as any thin areas or missed patches will be noticeable.

March 2023

Q. We accidentally bought some Resene Sonyx 101 when we needed to buy some Resene Lumbersider Low Sheen. We were wondering if it's possible to use Resene Sonyx 101 as a first coat with the Resene Lumbersider Low Sheen as the topcoat. We're painting exterior stucco.

A. Absolutely this can be used for as a first coat. Keep in mind that Resene ColorShop staff can make a colour greyer or darker if that may help you to use up the leftovers.

March 2023

Q. Is there anything on the market that can turn acrylic paints into metallic?

A. Resene does not have anything that can be added to turn acrylic into metallic.

However, we do have a waterborne metallic range – Resene FX Metallic paints are available in a range of colours.

March 2023

Q. I have a lightly damp masonry wall which has been painted with latex paint. I like to apply a lime or limewash paint over the existing paint. Which primer and topcoat product should I use?

A. How damp is the wall, are you intending to repair where the moisture is getting in? How well has the latex paint adhered?

We have two options that are popular for limewashing:

Some customers will use both options to have the colour definition and the texture.

March 2023

Q. I need to paint a 35L cast iron wine press and I’d like to use a food safe paint. There is minor rust present in the juice pan, however I’m in the process of sanding this back. There shouldn’t be any oil in the cast iron. I’m not 100% certain that it’s all cast iron: some parts maybe just plain steel. Can you recommend what to coat it with?

There is existing paint on the wine press, but I have no idea what type/how old. It could be very old paint. I will be sanding it away.

The sheen isn’t particularly important - low sheen is probably best, but I’d take your advice on that.

A. Resene doesn’t have food grade certification on our products. That’s not to say they wouldn’t meet the grade it’s just not a field we have specialised our products in and put them through the regulated process for approval.

If this is for commercial use and needs the approval food grade products, the team at Altex Coatings can help.

Otherwise, if you don’t need a certified food grade option, I think the original coating was likely a single pot enamel and we can give you a like for like system. The benefit being, these are all single pot and easy maintenance if ever needed.

Apply one coat of Resene Rust-Arrest, followed by one coat of Resene Enamel Undercoat and two coats of Resene Super Gloss in our desired colour.

March 2023

Q. I am keen to understand why I cannot get my tint separate from my paint. This enables me to better tint my paint to match my requirements.

A. We mostly do this for quality control, as we can't be sure that the tint will end up in Resene paint, in the correct sized can or in the correct product. The tint can dry when left out causing colour problems We can't control the colour outcome, which can cause mistints to come back to our stores. We do sell MPS stainers which are small bottles of colourant to tint undercoats and adjust colours for matching.

February 2023

Q. I have recently had a house fire which sent smoke billowing through our bedroom. With the lampshade removed it looks like the smoke has stained the ceiling. The insurance company said that the colour difference is due to the lampshade and the effect the light directly has on the paint. Is there any way of telling whether the staining is due to the fire or simply the effect of the lampshade and lightbulb itself.

A. There is no test that can be done to determine the cause of this stain. It is not uncommon for this to appear around light fittings that have been in place for some time.

February 2023

Q. What paint would you recommend for wooden chopping board. It's sanded but I want to paint it black or dark grey. It must be tough and food grade paint.

A. Resene does not have a paint system that we are able to give long-term assurance on, there is nothing we can offer that will have resistance to knife chopping. Perhaps a tinted resin-like liquid glass might work.

February 2023

Q. Can 10 litres of Resene White that is already tinted be tinted to something else?

A. Yes, usually this can be done. It can be tinted, but the existing colour will limit the colours you can choose from. A charge for tinting will apply.

February 2023

Q. I've used about a third less paint than I would have expected when calculating litres of paint required per square metres. Does that mean my coverage is too light? Should I put a third coat on?

A. Yes, sounds like you have applied a bit light. Once a third coat is applied you should see a true colour as well as have better film build for a more stable paint finish.

January 2023

Q. Can I use Resene Lustacryl semi-gloss waterborne enamel paint to paint a eating plate to put food on?

A. Yes, if the coated surface is left to cure for at least two weeks then wiped down with warm water and mild detergent. However, the paint will not withstand washing in a dish washer or hot water/detergent.

January 2023

Q. The previous owner has painted the glass roof of our conservatory. The paint is peeling off easily. Is there a painting system I can apply to successfully reduce heat and brightness on glass?

A. My guess is that there was no sealer applied to the glass first and that the paint has been directly applied to the glass.

Remove the entire existing coating. Thoroughly clean the glass surface. Apply a thin coat of Resene Waterborne Sureseal sealer and allow it to cure without water contact for at least 48 hours before overcoating. The sealer is not designed to be applied as a thick wet film thickness, the thinner the coat the better. Then apply two coats of Resene SpaceCote Low Sheen (if on the interior side of the glass) or Resene Lumbersider Low Sheen (if on the exterior side).

The new paint system will take five days to develop good initial adhesion and continue to cure for an additional three weeks until a full cure occurs. In the early stages, the paint surface will not have good resistance to cleaners or abrasion, as these features develop as the film undergoes curing. Note that the painting will not reproduce the original features or hardness properties of the original glass and adding any paint system will always require a level of maintenance.

Please note that the Waterborne Sureseal is a coloured sealer and will not dry clear, if you plan to paint the exterior of the glass.

January 2023

Q. Can I use a testpot to alter the colour of a pot of waterborne enamel semi-gloss?

A. To mix paint to alter colours, the products need to be the same. The product in a testpot is Resene Lumbersider Low Sheen – an acrylic low sheen. Mixing with a waterborne enamel will cause a non-uniform dried finish as well as the products not performing as well as they should.

December 2022

Q. What is the best way to paint a brand new vinyl head rest?

A. If the vinyl is soft/malleable in any way, paint products will not adhere for very long as the flex acrylic paint has is less than soft vinyl.

If the vinyl is hard and rigid, degrease and clean using Resene Interior Paintwork Cleaner. Apply one coat of Resene Waterborne Smooth Surface Sealer. Leave for 24 hours to harden. Apply one coat of Resene Quick Dry primer undercoat, leave for 48 hours to harden. Apply two coats of your chosen topcoat – Resene SpaceCote Low Sheen or Resene Lustacryl semi-gloss are good options.

December 2022

Q. I need to seal old railway sleepers that have been creosote treated. When hot they leak. My research tells me they can be sealed effectively by penetrating epoxy resin. Have you any products that would seal sleepers?

A. Unfortunately, Resene do not have a product to go over creosote treated timber currently. There are any chemicals that need to be encapsulated which a standard paint product wouldn’t be able to achieve.

December 2022

Q. What paint can I use for a metal rat cage that has gone a little rusty? I think it is made of steel and the rust is orange/brown.

A. We recommend priming with one coat of Resene Rust-Arrest, followed by two topcoats of Resene Lustacryl in your desired colour. Once painted please leave for five days, then wash down with warm soapy water, before returning the rat to their cage.

November 2022

Q. We have bollards that have been installed using epoxy grout in a tar sealed area. So, the top of the epoxy grout around the bollard needs painting to match the tarseal and has a matte finish. They want to paint this with something that will adhere to the epoxy and can handle outside conditions.

A. If this is a standard epoxy grout then our best recommendation would be priming the epoxy grout with Resene ConcreteSeal 3 in 1, then topcoating with Resene Blacktop (our driveway coating) as the best match we have.

Keep in mind that Resene Blacktop may look different to the asphalt and will weather differently over time also.

October 2022

Q. I painted this morning outside and it is bubbling in places.

A. Using dark colours on a warm/hot day on an already warmed substrate can cause blisters to appear. When it gets cooler (at night/first thing in the morning) have a look to see if the blisters have receded. Sometimes they shrink back to the substrate and there are no further issues.

If they do not shrink back, you will need to remove the poorly adhered coating and start that area again when its cooler.

October 2022

Q. Can you use testpots to paint shoes?

A. It has been done before. The outcome is usually good but not great – the flexing of the shoe upper does lead to the paint splitting along flex lines. If the shoes are more rigid without flex lines the paint finish will look better for longer. It is also critical to remove existing polish residues as these will interfere with adhesion.

June 2022

Q. Are your paints in testpots multi-surface paints? Do they need a sealer/varnish over it? Do they need baking if using for art work e.g.. on canvas/ceramic/glass?

A. Resene testpot paints are made using a conventional waterborne resin and are suitable for exterior and interior application to an appropriately prepared and primed substrate.

The applied paint does not need baking to dry and doesn’t require a clear varnish.

June 2022

Q. We have some graffiti painted on a rough concrete surface. We would like to use some paint stripper to remove it. Do you think this is a good option and feasible? Do you have a product that you would recommend? We would prefer not to paint over it as that will just provide an easy surface for them to hit again.

A. Try Resene Graffiti Cleaner.

June 2022

Q. I want to paint a ship container. It is currently faded green. Should I undercoat with some sort of metal primer ?

A. Treat areas of moss/mould infestation with Resene Moss & Mould Killer diluted and used to label/data sheet instructions. For heavy infestations more applications may be needed. Scrub down using Resene Paint Prep and Housewash diluted and used to label instructions. Rinse clean or hose down with copious amounts of fresh water ensuring all wash solution and surface chalk residues are removed.

All paint that is flaking or unsound must be removed by using mechanical methods, (3M Rust and Paint Removal Disc), chemical stripper or high pressure water-blasting taking care not to damage either the substrate or the surrounding areas.

Remove all areas of white corrosion material and as much red rust as is practicable and all paint that is flaking or unsound must be removed by using mechanical methods e.g. 3M Rust and Paint Removal Disc, to leave only soundly adherent corrosion products taking care not to damage either the substrate or the surrounding areas.

Spot prime prepared areas of corrosion with Resene ArmourZinc 110 and then apply a full coat of Resene Pre-coated Steel Primer and finish with two coats of the Resene Summit Roof CoolColour version of the topcoat colour.

The CoolColour version of a colour will reflect more heat compared to the same colour made using non-cool pigmentation. The CoolColour system will reduce but not eliminate heat related stress on the substrate.

June 2022

Q. I’m looking for a waterborne sealer for concrete. I’m unable to access the outside of a concrete wall, so need a product that can be applied to the inside to stop water penetration from the outside.

A. Resene HydraBlock is the only product we have for this application.

June 2022

Q. Can you tell me whether the LRVs of Resene paints is based on a gloss finish? I am trying to take a Resene colour LRV and then determine what the LRV might approx reduce to if it were a matt paint and then if it were a matt paint applied to a textured surface (eg stucco plaster).

A. LRV is a measurement of reflectance of visible light, colour only. The LRV does not change with the gloss level.

June 2022

Q. What is the reason I am getting lots of tiny bubbles in the paint as I roller coat. The temperature is about 17 degrees and it is dry. The equipment is dry and it is a brand new tin of paint.

A. Air entrainment can result if the paint is over rolled, if the open time of the paint is short then the air bubbles will burst but there will be no flow and levelling to allow for a uniform film to form.

June 2022

Q. Can you please advise if Resene Aquapel can be used to the top of side of existing concrete slabs and/or the inside face of existing low height concrete retaining walls to waterproof/stop moisture coming through to the top/onside face?

A. Our Resene Aquapel treatments will only render the substrate water repellent, not waterproof.

Re retaining walls, if back filled there should have been a waterproof barrier applied, usually a bitumen-based product, before the concrete was back filled.

We do have Resene HydraBlock which is a water based two pack epoxy hydrostatic barrier that can be applied to the exposed face. The coating will need topcoating with a pigmented system to give protection against UV. However application must wait until summer when the moisture content of the substrate should be at its lowest level.

If the hydrostatic pressure exceeds the barrier adhesion then break through can still occur.

June 2022

Q. How long will an opened tin of paint last? Also what about an unopened tin how long will that last?

A. There is no set use by dates. For an opened can of solventborne paint as long as the can is sealed and stored in a cool well-ventilated area the time is long, when reopened there may well be a skin which should be carefully removed before re mixing to a uniform consistency.

For a waterborne paint the same applies, however waterborne paint can undergo bacterial contamination, which is detected by an off odour to the can contents. We do add in can preservative but once this is consumed bacterial growth can occur. Bacteria can be introduced to the point from the environment or from application tools.

Unopened paint, stored under cool well ventilated conditions can be stored for many years, once opened it will require stirring until homogenous. It may still develop bacteria over time and skinning.

April 2022

Q. I am hoping you can help me with some Pantone colour matching? We need this to match our new branding and get half and quarter strengths.

A. Resene does have some matches to Pantone colours, however, we do tend to catch to the ‘c’ (coated) versions rather than the ‘u’ (uncoated) versions. Our Colour Lab can create quarter and half versions if you need them.

April 2022

Q. I have a tin of Resene Sonyx 101 that is dented. Will the paint still be ok?

A. The dent will not affect the paint.

April 2022

Q. We want to do some quick jobs at the end of summer to make our home better for the colder months. Please give us some project ideas of what to focus on:

A. Some areas to focus on:

  • Treat any moss and mould inside and out, otherwise it will only get worse over the wet months. Don’t be tempted just to wash it off. Moss and mould need to be killed otherwise they will just keep growing where they were. Use Resene Moss & Mould Killer to treat the mould. Never paint over mould – it will just find its way through the paint and ruin your new paintwork!

  • Ventilate, ventilate, ventilate! If bathrooms are getting steamy over spring and summer, in winter the walls are likely to be dripping. Wet bathrooms lead to moisture issues. Make sure you have a good ventilation system in place and if need be consider upgrading to a more efficient and effective option.

  • Wash down any paths and decks. Use Resene Deep Clean on concrete pathways and let it work with the weather to clean the path. Or for a more instant result use Resene Paint Prep and Housewash. Keeping paths and walking areas clean will help to reduce the risk of slipping. When surfaces get wet over winter, the slip risk increases.

  • For areas that tend to get slippery, paint them in Resene Non-Skid Deck & Path. This is a lightly textured finish that helps give feet and shoes something to grip onto which reduces the risk of slipping. Paint exterior stair edges in a light Resene Non-Skid Deck & Path colour to make it easier for those moving up and down the stair.

  • Focus on finishing any exterior painting or staining before interior work as it will be much harder to get this done over winter. Fix any rotten areas of timber or exposed substrates to ensure they are well protected coming into winter. If you’re painting outside keep an eye on the temperature gauge and the weather. As the days get shorter you’ll need to stop painting a bit earlier to give the paint time to dry before the temperature drops off at the end of the day.

March 2022

Q. I want to spray from testpot to touch up a solventborne finish. Can a Resene testpot be successfully thinned for air spraying with any of water, alcohol, iso propanol, acetone/MEK, acrylic spraying thinner or another? What mixing ratio of solvent is possible?

A. Resene testpots contain Resene Lumbersider Low Sheen. This can be thinned up to 10% with either water or Resene Hot Weather Additive.

We do not guarantee full adhesion to a solvent borne finish, without a thorough de-glossing of the current solvent coating.

February 2022

Q. We have a concrete rehabilitation project where part of a pumpstation is wet/submerged when the screws are in operation. If we find cracks too small to repair with injection systems (<0.3mm) the client wants to paint them with a bridging paint. What would be best for this?

A. We have no standard waterborne paint solution for areas that are submerged. The only suggestion would be to use a bitumen tanking product such as Resene Water Lockout or replaster.

October 2021

Q. We have some structural steel to coat to IZS1. Does Resene Armourzinc 125 meet the requirements of IZS 1?

A. Sorry but no, we would recommend Resene Zincilate 11. Resene Armourzinc 125 does not have the zinc content to meet the AS 2312 IZS1 specification requirements, but when overcoated forms the base of a durable paint system for steel.

September 2021

Q. What do I use to back paint glass?

A. We sell Resene Imperite I.F. 503 for painting splashbacks.

The paint is spray applied and the base colour is then over coated with either a coat of grey or black using the same product.

Standard glass is not used for splashbacks. You need low iron heat tempered glass, as the green tone in standard glass changes the colour when viewed from the front.

August 2021

Q. Can I use Resene Lumbersider Low Sheen under Resene Sonyx 101? I am trying to use up the paint I have before buying more.

A. Yes, Resene Lumbersider can be overcoated with Resene Sonyx 101, or vice versa.

August 2021

Q. Are you able to colour-match a food product? I could dry it and sent to you.

A. Yes we can. If you bring it into your local Resene ColorShop our team can arrange a colour match for you.

August 2021

Q. Is Resene Aquapel water vapour permeable?

A. Yes both Resene Solventborne Aquapel and Resene Waterborne Aquapel are vapour permeable.

August 2021

Q. I have some Resene Lustacryl waterborne enamel based paint with anti-mould added in. Can I mix this with white latex paint?

A. Resene Lustacryl is based on a self-cross linking resin system and can only be mixed with paints formulated on the same resins system.

August 2021

Q. Can you confirm the operational temperature range for Resene Uracryl 402?

A. Dry surface temperatures less than 100°C.

August 2021

Q. How long should we leave laying carpet after painting skirtings?

A. We are not aware of any restrictions on painting after installing carpet. Definitely painting skirtings then carpet installation will inevitably see damage to the skirting paint.

August 2021

Q. I've had a painter come in who works for a local building company who has admitted to adding food essence to his enamels to lessen the smells. I would be interested to hear if anyone else has heard of anyone else doing this.

A. Addition of a fragrance to mask paint odour is common in Asian markets but usually only for waterborne paints.

As long as the ‘fragrance’ is compatible with the solventborne enamel there may be no technical reason why it can’t be added. The masking of odours can be a trap as this may see a reduction of ventilation and can lead to a higher exposure level to released solvents as the brain may think, nice smell no danger.

Would we condone this? No.

August 2021

Q. Can I use Resene Hi-Glo over Resene Lumbersider Low Sheen?

A. Yes, as long as the Resene Lumbersider Low Sheen coating is chalk free and sound.

August 2021

Q. I have a white rustic photo frame that I would like to paint/stain to have a more orange/brown timber look to it. I would prefer to not sand back the white as I like the rustic detailing. Do you have such a product that is semi-translucent but can add colour?

A. Resene Aquaclear with added Resene Colorwood Enhance may well work. You can view samples at your local Resene ColorShop.

July 2021

Q. What test can you do to see if the paint surface you are recoating is waterbased or oil based ?

A. Wipe down the surface to be tested to remove any surface chalking, then wet a cloth with meths and quickly transfer to the cleaned area and rub. If the paint surface softens or is removed then chances are that the paint is based on a conventional waterborne resin system.

June 2021

Q. My testpots are going gooey once I have stored them for a while. What do I do?

A. Testpot paint will thicken over time. We recommend keeping them in a cool and dry place to extend life and it’s best not to store them for too long - once opened and used, the more air in the pack the more they will dry out.

May 2021

Q. Can Resene Summit Roof paint be used on wood?

A. Yes, but only if the timber has been appropriately primed.

April 2021

Q. What does ‘lay off’ mean?

A. The term lay off is when you apply 3-4 roller widths of paint then with what is essentially a dry roller sleeve roll down from top to bottom with a 50% roller overlap. It is the technique to achieve an even lay down and finish.

April 2021

Q. I heard that you can paint freestanding wood-burning fireplaces. We have just had a chimney sweep to clean ours he said you can paint them.

A. The only paint we have is for this is Resene High Temp Enamel (black only).

April 2021

Q. I have a tin of your Resene Enamel Undercoat, is it okay to cover this with an acrylic?

A. Yes, waterborne topcoat paints can be applied to Resene Enamel Undercoat.

February 2021

Q. I've been searching high and low for this, with no luck! I'm after a heat-resistant black paint that can be applied to timber (plywood in particular), to shield some heat coming from a gas stove (nothing too serious, but it's more to give the wood a bit more longevity). Even if it's a sort of heavy duty coating to protect against oil/cooking splatter - similar to a splashback. You can maintain hand contact on the timber when the gas stove is at full heat.

A. Apply a prime coat of Resene Quick Dry then two coats of Resene SpaceCote Low Sheen or Resene SpaceCote Flat. The higher the gloss level the easier cleaning will be.

February 2021

Q. I was wondering if you have the ability to analyse a chip and advise what paint finish has been applied to a product? E.g. Moulded plastic with a silver base, metallic paint (how many layers) with a UV finish. Do you have the ability to test/advise that?

A. Solvent resistance can be used to establish a paint type, but this may not be conclusive especially if all solvents that are used show no reaction. We can measure the total dry film thickness of a paint system, if the components of a system are of different colours then this can extend to each layer of a paint system.

February 2021

Q. Is there something I can use to paint over silicon?

A. No paint that will stick to a non-paintable silicone based sealant unfortunately.

February 2021

Q. I want to paint two sets of old cork placemats ... you know the ones your parents had that have a (delaminated) picture on the front and perfectly good cork on the back. I was wondering about sanding up the front and then painting but which paint products would be best?

A. The only paint system that would give you heat resistance would be a traditional solventborne enamel. Painting may cause the picture side to de laminate but a clean down and sand then apply a coat of Resene Enamel Undercoat and finish with two coats of Resene Super Gloss or Resene Lusta-Glo.

February 2021

Q. Is it possible to get a paint colour mixed at one of your stores based on a HEX colour code?

A. If you can print out the Hex colour and bring the printout to your Resene ColorShop they can usually create a colour match or arrange for our Colour Lab to, or they could show you similar Resene colours.

You can use the free Resene Find-A-Colour tool on our website and it will show you close Resene colours. Type your hex value into the HEX box and select the Search button. This will show you similar Resene colours to your colour. You can view A4 swatches of the colours at your Resene ColorShop to see which would suit you best. I would usually recommend doing this option as it can be hard to print electronic colour accurately enough to get a good colour match done.

January 2021

Q. How to paint carbon fibre?

A. Carbon fibre can be painted like any other substrate, the key is to give it a good clean first to remove any release agents. Wash it with a water soluble cleaner/detergent, dry thoroughly then use a solvent degreaser. Dry thoroughly then give it a good sand, grit depending on whether topcoating straight over of priming first. Bearing in mind carbon fibre is full of minute pinholes which will show through the paint.

In the past we have clear coated with Durepox then sanded and re-cleared to eliminate the pinholes, with the carbon fibre effect showing through. The process you use will depend on how good of a finish you require.

January 2021

Q. How do I determine what paint is on my living room walls? I would like to paint them again. Unfortunately there aren't any old tins lying around.

A. The existing wall paint could be a conventional waterborne paint, a waterborne enamel or a solventborne enamel.

Wet a cloth with methylated spirits and quickly transfer to the painted surface and rub, if the paint softens or dissolves then it is more than likely a conventional waterborne paint.

If not, then it is a waterborne enamel or solventborne enamel.

I would be surprised if the existing wall paint is not a conventional waterborne paint. If it is, clean down using Resene Interior Paintwork Cleaner and then apply two coats of a waterborne wall paint such as Resene Zylone Sheen or Resene SpaceCote Low Sheen.

If the meths tests indicates that the existing paint is not a conventional waterborne paint then sand the surface after cleaning to profile for recoating, dust off and apply a coat of Resene Quick Dry then finish with two coats of either of Resene Zylone Sheen or Resene SpaceCote Low Sheen.

January 2021

Q. I need a non-reflective, recessive grey colour that is below 30% reflectivity. This is for painting microwave antennas to comply with RMA rules. Can you please confirm the right grey colour please?

A. I recommend Resene Gunsmoke.

December 2020

Q. Do you do custom paint mixes? I am wanting to get some paint in my company colours.

A. Yes, if you have a colour sample to match to and this is dropped off at a Resene ColorShop, the match can be done for you.

November 2020

Q. Why can you mix Resene Lumbersider 1 and 4 litre with Resene Double Drought but not a 2 litre can?

A. Resene colours are tinted off a range of tint bases. We do not offer all products in all can sizes in all tint bases. While we have a 2L of Lumbersider White this is the only tint base we have in this size, the colour Resene Double Drought is not tinted off a white base. We do have the tint base in a 1 and 4 litre size to tint the colour.

September 2020

Q. We have some steel anchor bars that are galv and epoxy coated with some damage to them. To repair, we have been recommended Resene Armour Zinc 120. Our designers are wanting to know if this has the same durability characteristics as our galv + 200 micron epoxy coating.

A. The Resene ArmourZinc 120 applied at 75 microns dry film thickness is the zinc rich respire pint for damaged galvanising. The product can be overcoated with high build epoxies. And when topcoated will have the same durability as HDG+epoxy.

September 2020

Q. What would you paint the inside of a domestic water tank with? Probably a bit tricky given the fact there is drinking water involved.

A. We have no lining for the interior of a concrete tank to address leaking. Carboline do have epoxy linings for tanks used for the collection of potable water but these are specialised systems and not suitable for use by DIYers. Most domestic water tanks have small openings which makes access to the inside difficult and if the lining is solventborne there is a safety issue.

September 2020

Q. Would you make a recommendation for a primer for small 3D printed items? It must have a positive cure, be brushable and very easy to sand. The final coat will be an automotive spray can type. The 3D printer plastic is PLA.

A. Paints can fall into various categories based on their solvent. The most common ones are oils, enamels, lacquers and acrylics, most of which will work well with both ABS and PLA. As you’re new to this, you’d be wise to stick to acrylic paints since they dry fast and can be cleaned with water. You can use any Resene waterborne paints including Resene testpot paints.

June 2020

Q. I have just finished painting two rooms inside and realised that the paint guy made up my paint in your Resene Sonyx 101 outdoor paint. Do I need to be concerned?

A. Use of a semi-gloss paint for interior rooms is not common, Resene SpaceCote Low Sheen or Resene Zylone Sheen is our common wall paint option for non-wet areas. When used inside, Resene Sonyx 101 will not be as tough as other Resene semi-gloss options such as Resene Lustacryl, but apart from film toughness there should be no issues, as long as it is not used for painting bathrooms or ensuites.

June 2020

Q. If I undercoat both new wood and MDF with acrylic, can I use a spray can to paint the topcoats?

A. If you allow the Resene Quick Dry to cure for at least two days there is a better chance of being able to apply a spray can colour. The issue with spray cans is the solvents used as propellants. Avoid applying heavy wet coats of the spray paint.

June 2020

Q. I vaguely remember a powder product that could be added to two pot systems to make them go off quicker. Is there still such a thing?

A. We can only accelerate the cure of Resene Uracryl 400 Series topcoats but this can only be done at Resene Head Office, the accelerator is not a solid but a liquid.

June 2020

Q. I have a scenario where I am welding a new section of steel CHS post to an existing steel CHS post. The location is exposed but not rain washed (it is under a canopy/awning). The new section of CHS steel post will be hot dip galvanised but the weld to the existing post needs to be completed on site. Can you please give me recommendations for a procedure applied after the weld has been completed to achieve protection from corrosion?

A. For site repairs to damaged or welded areas; Water blast at 3000psi remove all salts, loose or flaking coatings, dirt, dust and any other contaminants. Allow the surface to dry.

Any welded sections will need special attention. After welding, all surfaces to be painted must be thoroughly cleaned and free from flux, weld spatter and surface defects including cracks and deep pits. Weld spatter must be removed carefully by mechanical grinding. There should be no areas of rough welding (Removal of such defects may affect weld certification.) Weld flux must be removed by thorough washing with a detergent solution followed by copious washing with fresh water.

To any weld and bare steel areas, power tool clean the area to a white metal finish as per SSPC-SP11-87T Standard. Care must be taken not to damage the sound coated surrounding areas. All paint edges must be feathered to a smooth finish and the sound paint coating slightly roughened to assist in adhesion of the newly applied coating system. The contractor shall ensure that there is no deterioration in the condition of the surfaces to be painted between the actual preparation and the application of the priming paint. Any extraneous matter deposited before painting shall be completely removed and the surface restored to its prepared finish state.

Spot prime all bare prepared steel areas only with Resene ArmourZinc 120 to achieve a dry film thickness of 75 microns. Ensure an overlap of 10mm onto sound existing painted surface. Then apply the specified epoxy/urethane over coat system.

June 2020

Q. I accidentally used Resene Quick Dry primer over old GIB® instead of Resene Sureseal (I confused the two that I had and didn’t realise until afterwards). It’s only in a small area, in the laundry. What can I do to remediate?

A. Overcoat Resene Quick Dry with Resene Sureseal before topcoating.

May 2020

Q. I am having problems with my painting. I am using Resene undercoat, and I have two cans of white semi-gloss waterborne enamel. All three bubble when put on and leave brush or roller streaks when dry. I have changed my stroke technique several times. I tried a fluffy roller first, a foam roller, then a brush.

A. We recommend rolling using a Resene No 1 sleeve this is an 8mm nap Dacron sleeve.

There is always a degree of orange peel when rolling. We aim to reduce this by correct roller sleeve selection and product thinning to allow for flow and levelling.

May 2020

Q. I love your paints but I do have trouble opening the tins, other than when I am opening them for the first time. I use a screwdriver (not a large one but the biggest I have) to lever the lid up but find the lid buckles, even though I am circling round the lid. Am I sealing them in the wrong way when I stop painting - perhaps a gentle tap with the hammer all around the rim is not okay? Or is there something else I should use to reopen the tin?

A. Using a screw driver to open a can often does not allow for opening without damaging the lid. You can purchase paint can openers from Resene, these reduce the chance of lid damage. Once opened always wipe wet paint from around the lid edge and can top before closing.

May 2020

Q. I want to paint some paua and other shells. I don't want to paint the whole shell, just some highlighting. I'm thinking Resene testpots of metallic paints. And what undercoat - if any - would I need?

A. You could try direct application of testpot paint but we have not investigated painting shells with waterborne paints.

May 2020

Q. I have some silver plated items that I want to paint. What do I use?

A. We have no tested adhesion primer for silver. The only suggestion would be to try Resene Vinyl Etch.

May 2020

Q. Can I paint an acrylic topcoat over a Resene Alumastic base?

A. Yes, you can apply Resene Summit Roof to the Resene Alumastic as long as it is within five days of application of the Resene Alumastic. Prior to topcoating with Resene Summit Roof, wash down using Resene Paint Prep and Housewash diluted and used to label instructions.

April 2020

Q. I have been using pots of paint but have found that they have started to get thick.

A. Once the air gets into the pot the paint will start to thicken. The more paint you use, and the less paint in the pot, the more prone the paint is to thickening because there is more and more air vs the amount of paint. You could try laying a piece of cling wrap or similar onto the surface of the paint to prevent the contact with the air in the pot. Then put the lid on as normal. This should help to slow down any thickening.

April 2020

Q. I have used a new can of a colour that I had painted recently, but the new can seems to be different. Can you please advise why?

A. Resene formulations are based on specific master stands.

There are a number of things that could cause a colour to be wrong:

  • Getting it tinted into two different product types. Are the two products the exact same product?
  • A mistint – i.e. the colour has not been tinted correctly. Each colour is made up of different tinters. If too much or too little or a tinter has been added or one has been missed the colour can end up wrong.
  • The wrong colour has been tinted. E.g. one colour has been asked for and another has been tinted.
  • The paint hasn't been stirred fully so the colour isn't mixed in properly.
  • The paint colour has been contaminated – e.g. if the brush is used for another colour, then that colour could be transferred into another colour. Paint can take a few days to fully dry so it's usually best to judge the colour once it has time to dry properly.

April 2020

Q. What do I need to do to paint over varnish?

A. Using Resene Interior Paintwork Cleaner ensure the surfaces to be painted are clean and free from grease, pay particular attention to hand contact areas.

Then there are two options, sand to degloss then apply a coat of Resene Quick Dry primer undercoat or apply a thin coat of Resene Waterborne Smooth Surface Sealer and allow to cure without water contact for at least 48 hours before overcoating. The sealer is not designed to be applied as a thick wet film thickness or give opacity, the thinner the coat the better.

Then apply two coats of a Resene waterborne enamel topcoat in your required colour and gloss level.

April 2020

Q. Can you paint Resene Lustacryl or Resene Sonyx 101 over Resene Uracryl 402?

A. Yes but the Resene Uracryl will need to be cleaned down and sanded then a full coat of Resene Quick Dry applied before topcoat application.

April 2020

Q. I have just purchased Resene Aquaclear. The clear varnish is very milky although I have stirred and mixed. Is this normal?

A. Waterborne clears are milky in can but dry clear.

March 2020

Q. Do you supply acrylic airbrush paint?

A. We do not have specific acrylic paints formulated for air brushing. However we have had other customers use Resene testpots (waterborne paint) for air brushing.

February 2020

Q. Why does the oil-based paint form a skin when it sits in the container for more than a few hours and how do I stop this happening please?

A. Skinning in alkyd based paints is a common feature of storage of a partly used can but can also occur in a newly opened can. Alkyd based paints dry by reaction with air (oxygen) so at the top of a can or during hot conditions some of the solvent can evaporate and thus leads to the state of cure as air is also present.

For storage this can be reduced by storing the can inverted ensuing the lid is firmly attached. During use regular string and addition of a small amount of thinner usually turps can delay the process and help re incorporate the partly cured skin. The success of the latter is related to how far the curing of the paint skin has occurred.

Try to keep the paint cool and out of direct sunlight.

February 2020

Q. I have painted timber with two coats of exterior acrylic paint. Some days later dry boards stick to each other. Why do painted things stick to each other? How can I fix this?

A. If two surfaces painted with a conventional waterborne paint come together under pressure they will stick. This is known as block resistance, Cross linked waterborne paints such as Resene waterborne enamels have block resistance and once cured for a time boards can be stacked without sticking.

February 2020

Q. My husband wants to let off bora bombs how long after painting should he do this?

A. Allow at least 1 month. However a paint film will act as an isolation barrier between the chemical and the timber.

February 2020

Q. I have some quite old alkyd undercoat which has thickened slightly. Can I dilute this slightly and with what – turpentine?

A. The thickening is due to in can part curing of the paint, common with alkyds and there is often a skin develop on the top of the paint. Stir to achieve a uniform mix and then judiciously thin with turps to achieve a brushable consistency. Take care not to over-thin as this will reduce the paint thickness and may also see runs and sags appear.

January 2020

Q. What is the recommended ratio for thinning your waterbased paint for spraying?

A. The standard recommendation is to thin only to achieve good atomisation, the amount of thinning will vary with the spray equipment being used. We have an Applications Consultant who can provide more advice – email us at and we can pass on contact details.

January 2020

Q. For internal paint, how long can it be stored and used for touch ups before new paint should be purchased?

A. There is no real storage limitation for a solventborne paint although part cans of alkyd enamels can develop a surface skin.

Waterborne paints however are a different issue, Waterborne paints can develop bacterial contamination (recognisable by paint odour) during storage, the potential for bacterial contamination is dependent upon storage conditions with cool well ventilated storage being the ideal.

We add some biocide to paint to control growth of microorganisms, however once this has been consumed then bio growth can develop. When opened cans are then sealed and stored there is an increased chance of bio degradation occurring as the paint is open to atmosphere and possible contamination from application tools.

January 2020

Q. How can I tell the type of paint in a container, which has no label?

A. It’s not easy but you can differentiate between a waterborne and a solventborne coating by taking a portion of the paint and adding a small quantity of water and mixing it. If the water separates then it is a solventborne paint.

January 2020

Q. Can you tell me how the colour is affected if the incorrect base tone is used? For example if a colour is meant to have a light tone base but it is mixed using a mid-tone base. How does it affect the colour?

A. There are two main issues – the colour will not match the colour standard and the durability may be compromised if colour levels in the tinted colour exceed allowable levels.

December 2019

Q. We have a colour that we think looks different to the colour chart. How can we be sure they are the same?

A. Our testpots and colour charts are matched to the same colour standards and our Colour Lab team use very precise measures to make sure they match. Our colour charts are made using the same paint that you would use on your walls. However if you are using a much higher gloss paint, the higher gloss level can make it seem cleaner and brighter, and a lower gloss level can make it seem darker. Also sometimes more of a colour or the other things in a home and the lighting can reflect onto the colour and change how you see it.

If the colour is very different to the testpot/colour chart, it may be that it has been mistinted, which means the wrong quantities of tinter may have been put into the can. The paint could be brought back to the shop you purchased it from for them to check to see if it is a good match to the chart or whether there was an issue with the tinting.

December 2019

Q. How important is the quality of the painter or wallpaperer to the finish?

A. When it comes to painters and wallpaperers, you tend to get what you pay for. Professionals usually achieve a better quality job, with less hassle and disruption for you, using better quality materials. All of this adds up to a better finish, less stress to free you up to focus on other things. If you think it’s expensive hiring a good painter, try hiring a bad one. A poor quality painter and materials tends to result in more coats, more callbacks and lost time, all of which will cost you time and money.

December 2019

Q. Do you make testpots in gloss finishes?

A. Most of our testpots are in a low sheen finish as that is the most popular finish for most projects inside and out. If you do want a gloss finish, we do sell small containers of Resene Art Action glaze which includes a gloss option. This can be applied over the normal testpot colour to change it from a low sheen to a gloss.

December 2019

Q. Which paint could you paint over black rubber paint and is it available in different colours?

A. Our only recommendation is to apply a coat of Resene Membrane Primer to the rubber surface and then apply two coats of a Resene exterior waterborne paint colour.

December 2019

Q. What is the difference between ceiling paint and wall paint? I have some touch ups to do but seem to have only the ceiling paint in the cupboard.

A. Ceiling paints are formulated at a near flat gloss level and do not contain a high resin content, this means that these paints have very poor burnish resistance and some may be removed by wiping.

Wall paints are generally formulated at a higher gloss level and on a different resin system. The selection of resin and the higher gloss level does give the paint film better resistance to cleaning.

November 2019

Q. Can Resene Enamacryl be mixed with Resene Lustacryl?

A. Sorry but no, as the products are based on different resin systems.

September 2019

Q. Is it okay to do exterior painting at this time of year? I have heard in the past that it can be too cold and affects the quality and durability of the finish.

A. There are three factors that affect the drying of waterborne paint, air temperature, humidity and air flow.

While it can be difficult to easily assess, if painting is possible we have recently launched Resene Wintergrade Additive which extends the possible painting window to achieve application over the colder months of the year.

September 2019

Q. Can I use Resene Lustacryl semi-gloss waterborne enamel over sound, oil based enamel?

A. Yes you can; however all old enamels need to be thoroughly sanded to a uniform dull finish, prior to applying the new coating (so the new coating adheres to the old).

It's often difficult to achieve this completely so is a good idea to use a primer first prior to the Resene Lustacryl. Resene Quick Dry primer would be best. Sand the old enamel as best you can, prior to applying Resene Quick Dry.

August 2019

Q. Can I add coloured paint e.g. a Resene testpot of Resene Lumbersider to Resene Aquaclear to colour it?  I know there are Resene Colorwood stains that you can apply under Resene Aquaclear and colour enhancers that you can add to Resene Aquaclear but these will not work in my situation. I want a slightly more 'solid' look without a complete paint finish look.

A. There is a good chance this will be okay but we have never tried this combination. The lower the amount of waterborne paint that is mixed, the less risk there is. Stability could be an issue, so would advise using soon after mixing.

August 2019

Q. I don't have a lot of time and would like to know some quick ideas of things I can do to get my house and garden ready for spring that won't take too long or cost too much.

A. Get your home ready for spring and summer with these quick tips:

  • Use Resene Paint Prep and Housewash for a quick exterior clean of your house. You should aim to wash your house down yearly – this will help keep it looking better and increase the life of your paint.

  • Use Resene Moss & Mould to treat any mould that has grown over winter.

  • Driveways and paths tend to grow lichen, moss and mould over time. Rather than having to scrub these areas, apply Resene Deep Clean and leave it to work with the weather. It's a long acting cleaner that will slowly clean your driveway and path. Best applied every 6 months to keep the surfaces clean.

  • You don't need to paint your whole exterior to get a fresh new look. Try painting your front door in your favourite bold colour using a gloss finish, such as Resene Enamacryl. The gloss will help the colour pop. Popular front door colours are bold reds, citrus hues of orange, yellow and lime, or for something less colourful, deep blue or black looks very sleek and modern. Another way to make a quick impact is to paint your home's letterbox and outdoor planter pots.

  • Decks can be rejuvenated with just a few hours work. Clean your deck first with Resene Timber and Deck Wash. Then once dry apply Resene Woodsman Decking Stain or Resene Furniture and Decking Oil. Or for timber decks, consider using Resene Non-Skid Deck & Path to reduce the risk of slipping when wet.

  • Remember to also clean up around your pool area. Use Resene Deep Clean for a long acting clean on walking areas around your pool, or for a quick clean use Resene Paint Prep and Housewash. Consider painting Resene Non-Skid Deck & Path on the main walking areas to avoid unwanted slips.

  • If you're planning a long summer of lounging around outside, remember to clean down wooden furniture with Resene Timber and Deck Wash, then finish in a Resene stain or oil.

While it can be tempting to leave decks and furniture to grey off, the timber surface will break down faster because it is not protected, which can lead to annoying splinters and the need to replace it faster. Most stained wooden decks and furniture should be recoated every two summers.

June 2019

Q. What type of paint would be best for using on a guitar?

A. It is my understanding that high gloss clear varnishes or paints are traditionally used for guitar coating. Resene Super Gloss would be the solid paint colour with the highest gloss level and hardness.

June 2019

Q. Might be a random question, but when rolling paint how do we ensure we get that classic ‘orange skin' texture?

I have done a patch job and whenever we paint over it, the paint is smooth making the patch obvious as the wall around it has this ‘orange skin' texture.

A. Our paints are designed to achieve a smooth as possible finish. Suggest you use a Resene No.1 sleeve roll. If you apply a good wet coat then use a dry sleeve to over roll you may be able to achieve more texture. 

June 2019

Q. How long is paint good for if stored correctly? i.e. Can we keep it for a number of years for when kids put holes in the wall etc? And, if we have two half buckets, will it damage the liquid if we were to pour it into one?

A. The storage of waterborne paint requires cool well-ventilated conditions to reduce the chance of bacterial contamination. Once paint is opened and used the risk of bacterial contamination of the paint increases dramatically. 

The paint smell is the easiest way to check for bacterial contamination. If a careful sniff of the can gives an odour response similar to smelly sports socks then there will be bacterial contamination.

As long as the paints and colours are the same you can mix them.  In fact storage in a full can is better than part cans as there is less air present.

June 2019

Q. Do you sell latex paint? If so, can I get testpots?

A. Latex is an old fashioned term for a waterborne paint; Resene sells a large range of waterborne paints including testpot colours.

June 2019

Q. I have some unopened Resene Lumbersider paint, 18 years old, stored for painting a rental property. It's time to finally paint it so will the paint be okay?

A. Not a common situation I must say. The paint technology that we were using when the paint was originally made has now been upgraded to achieve improved exterior durability. Suggest that you take the pail to a Resene ColorShop and ask them to put the pail on the store shaker.

Open the can and if it is homogeneous and contains no bits, or if the paint smells off (unwashed sports socks odour) then the paint would not be suitable for use.

May 2019

Q. I have some Resene Moss & Mould product. I've had it in my shed for the past few weeks which gets very hot. The container has swollen a little, is the product still ok to use?

A. The active agent in the product is sodium hypochlorite; the container swelling is a sign of the active undergoing heat induced breakdown, which will lead to a reduction in efficacy.

You will need to carefully release the pressure in the container, suggest that when it cools a little that you wrap the container in a towel or blanket (make sure either are disposal as they will more than likely be affected by the residual bleach component. Make sure that you wear eye protection and protective clothing and gloves and using a hammer and nail punch a hole in the screw cap to relieve the pressure.

There will remain residual bleach activity but we cannot say how much.

March 2019

Q. Can I overcoat Resene LimeLock with Resene X-200?

A. As long as the Resene LimeLock is clean and sound then no problem overcoating with Resene X-200.

March 2019

Q. I require a black tinter to add to creosote.

A. Creosote should penetrate into the timber substrate, if you add bulk colorant this will not be absorbed to any extent and has the potential to remain on the surface and weather away relatively quickly, so the original blackness intensity may disappear relatively quickly, especially on the northern elevation.

March 2019

Q. Do Alkyd Wallboard Sealer/SpaceCote K&B/Lustacryl K&B or Lusta-Glo have either Methylisothiazolinone or any other chemical ending with isothiazolinone in them.  I am highly allergic to these.

A. Solvent based products do not contain MIT but all the water based products do. There are many household products and shampoos that contain the same biocides. Wearing gloves and protective clothing can avoid skin contact during coating.

February 2019

Q. My shower step and associated door frame needs repainting. My thoughts were to use paint stripper to strip off old paint on the step (this is chipped and not in a good state), then sand that and the door frame. Is this the best approach, and what paints should we use? Quick drying between coats would be good if possible as the house is tenanted and we don't want the shower out of order for too long.

A. After stripping the existing paint system, thoroughly sand the bare timber dust off and apply a liberal coat of Resene Quick Dry then finish with two coats of Resene Lustacryl Kitchen & Bathroom (the system will not give wet slip resistance).

February 2019

Q. Is Resene Wellywood the colour people use for green screens or do they use something else?

A. Resene FilmPro Digital Green is the colour used for this purpose.  It is used with a tinted basecoat colour first.

February 2019

Q. I have water penetration in my house. I have dug out the earth in the area and the old seal paint has dried and flaked off. I do not intend to backfill the area, so whatever goes on the wall will be exposed to the elements. What is the best product to use to re-waterproof the wall?

A. As long as the paint system is not below ground level and water will not pond on the coated surface, you could use Resene X-200 (three coats) system applied over Resene Sureseal sealer.

Spot prime residual sound bitumen areas with Resene Membrane Primer and Resene Sureseal for bare concrete/block.

December 2018

Q. Can you buy a rimu additive for clear varnish?

A. Sorry but we do not sell tinted varnishes. But you can add Resene Colorwood Enhance to Resene Aquaclear which is akin to a tinted varnish. There are five Resene Colorwood Enhance colours - Jarrah, Walnut, Red Brown, White and Black.

December 2018

Q. Can you please provide the Resene equivalent to HEX colours?

A. We have a tool online that can help you find colours close to HEX values.

Electronic values are a guide only. We always recommend that you view the physical colours.

December 2018

Q. Can you advise me which standard you use for your Light Reflective Values?

A. Resene light reflectance values are measured from each colour standard using a spectrophotometer and are the CIE Tristimulus Y value (brightness) of the colour. This value is Resene's measure of Light Reflectance.

November 2018

Q. I have a piece of totara to use as a signing book for a wedding. It has been varnished with Resene Aquaclear waterborne urethane for interior and I was wondering if I needed to do anything else to it before using a fine tip sharpie ornament marker pen on it.

A. We have never looked at this application but it should be fine. You may want to check on a piece of pine or an off-cut of timber first.

November 2018

Q. My friend and I are doing a project for school and we are going to collect plastic bottles and turn them into more useful things to help the environment. We were wondering if you have any paint we can use to decorate our plastic bottles, to make them look more appealing, it would be good if the paint was waterproof so it can last in outdoor areas.

A. Your project sounds very interesting. The adhesion of a waterborne paint depends upon the plastic you are looking to coat.

I suggest that as a starting point, that you get a Resene testpot and apply it to the plastic bottles you have, to check adhesion. Apply the paint and then check adhesion after 4-5 days. Apart from adhesion, the other issue may be the flexibility of the plastic compared to the paint.

November 2018

Q. We have a client who has allergies to preservatives: Methylchloroisothiazolinone and Methylisothiazolinone and apparently this can be in water based paints. Could you let me know if it's in your paints or if there are certain interior paints that it isn't in?

A. Methylisothiazolinone and methylchloroisothiazolinone. Methylisothiazolinone (MIT or MI) and Methylchloroisothiazolinone (CMIT or CMI) are two preservatives from the family of substances called isothiazolinones, used in some cosmetic products and many other household products and is a common preservative in waterborne paints, from most waterborne paint suppliers. The MIT level in our paints is very low but is present and does have the potential to trigger an allergic reaction to a presensitised individual.

However, we are working on MIT free from the point of view that we won’t add MIT. However, all our resins currently used employ MIT as the preservative so a totally MIT free system is still a work in progress.

The MIT allergy issue is associated with skin contact of wet paint, once the paint film has dried the residual MIT is locked into the paint film and in essence, neutralised. So if an allergy sufferer wants to use the paint, the best protection is to wear gloves and protective clothing to avoid skin contact.

November 2018

Q. I have been using your paints for 40 years and love the quality. I find I am not getting the coverage with waterborne enamels that I used to get with oil based enamels. Am I by any chance doing something wrong as I have tried and tried and cannot get the coverage?

A. If a waterborne paint is applied at the correct wet film thickness, two coats is enough to achieve coverage for most colours. The issue we see is that it is very easy to apply waterborne paint at greater spreading rates and this then can result in a dry film thickness, which gives lower hiding. The choice of brush and more importantly roller sleeve also impacts upon coverage and therefore opacity.

The only better feature of a paint film that traditional solventborne enamel offers compared to waterborne enamel is hardness. Only a gloss solventborne enamel can be used for exterior painting and in the main these undergo early chalking.

November 2018

Q. I am having trouble getting a smooth finish with Resene Lustacryl. It dries so fast when I’m painting the trim outside and I am trying not to over brush. By the time I get more paint on my brush, there is already a sticky film and it looks patchy. I have tried the Resene Hot Weather Additive but are there any tips you can give me please? I may be applying thinly, as I don’t want runs.

A. We recommend addition of Resene Brushing Additive. Apply a liberal wet film and lay off. Do not overwork the wet paint as the wet paint sets up quickly and once this has occurred, you will create a disturbed film.

November 2018

Q. What can be used to paint over a powder coated Heat Shield that surrounds the back of our new woodburner? We have been told by the installer we would likely needing an etching primer and specific paint that is non-combustible or suitable for high temperatures

A. The only possibility is Resene Vinyl Etch followed by Resene Uracryl 400 Series topcoats.

October 2018

Q. I would like to paint a stainless steel board, could you please tell me what is the primer undercoat and the process?

A. Stainless steel does not readily corrode, rust or stain with water as ordinary steel does. However, it is not fully stain-proof in low-oxygen, high-salinity, poor air-circulation or industrial contamination environments. There are various grades and surface finishes of stainless steel to suit the environment the alloy must endure. Stainless steel is used where both the properties of steel and corrosion resistance are required.

Stainless steel differs from carbon steel by the amount of chromium present. Unprotected carbon steel rusts readily when exposed to air and moisture. This iron oxide film (the rust) is active and accelerates corrosion by forming more iron oxide which, because of the greater volume of the iron oxide, tends to flake and fall away. Stainless steels contain sufficient chromium and other rare metals to form a passive film of chromium oxide which prevents further surface corrosion by blocking oxygen diffusion to the steel surface and blocks corrosion from spreading into the metal's internal structure. Passivation occurs only if the proportion of chromium is high enough and oxygen is present.

There are over 150 grades of stainless steel, of which 15 are most commonly used. There are a number of systems for grading stainless steel. The most commonly used grades are 304 and 316.

304 Stainless is a Cr-Ni general purpose stainless steel. Grade 316 is the standard molybdenum-bearing grade, second in importance to 304 the molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments.

Where long term corrosion resistance is the prime requirement stainless steel is best left unpainted.

If damage to the protective oxide layer occurs stainless steel can show tea staining.

Tea staining can be described as: discolouration of the surface of stainless steel that does not affect the structural integrity or the longevity of the material. Visually it is a discolouration of the metal surface, which tends to follow the ‘grain’ of any surface finish. Although unpleasant to look at, it is not a serious form of corrosion. Aesthetically it is unacceptable so the following information is designed to help you understand its causes and institute a maintenance plan to keep your stainless steel looking better for longer. Tea staining of stainless steels occurs most commonly in coastal areas and becomes progressively worse the closer you get to water (note that most of New Zealand is considered a coastal area). Other factors such as pollution, higher temperatures, surface finish, (the smoother the better and more highly polished) and humidity can also increase the tea staining effect.

Painting is usually undertaken for aesthetics only. The stainless steel surface needs to be abraded to produce a mechanical key for a paint system and this damages the protective oxide layer.

Step 1: Scrub down using Resene Roof and Metal Wash.
Step 2: Lightly abrade the surface using very fine sandpaper e.g. 320 grit sandpaper or a red 3M poly pad. Care must be taken to minimise damage or scratching the surface as scratch marks may telegraph through the paint system.
Step 3: Apply a coat of Resene Armourcote 221 and finish with two coats of Resene Uracryl 402.

This is a decorative paint system only.

October 2018

Q. I was told that some of the ‘commercial’ paints have a higher percentage of ‘solids’. The painter said the one he uses is approx 60% solids and some of the others are only around 30%. I don’t know if he’s pulling my leg or not. I got the impression he just preferred to use what he was used to, rather than go the extra mile and use what I wanted him to use.

A. Paints are formulated at a range of volume solids, there is a difference between weight and volume solids and many companies give the weight solids as the numbers are often higher. Solids is not a measure of ‘quality’ as quality is determined by the formulation components and not solids, as high solids paints can be formulated using low quality raw materials.

October 2018

Q. I accidentally used a brush that had some turpentine on it (from cleaning it) with Resene SpaceCote. Will that affect the Resene SpaceCote badly? The brush had been brushed out on newspaper and left to dry for a few hours, but was definitely still wet with turps. I was loading it up with the Resene SpaceCote very heavily right from the start, and it seemed to paint very well and looks ok. Will there be any bad problems over time?

A. If the paint seems OK after drying then there should be no issues.

October 2018

Q. Can you get odourless turpentine?

A. Not aware of odourless turps but Resene Thinner No.2 is a lower odour equivalent to mineral turps and is available from any Resene ColorShop.

October 2018

Q. I will be painting over turpentine base paint. Is 240 grit sandpaper okay and then a good wash down if using a water based paint to finish?

A. Degrease and thoroughly sand. Yes, I recommend applying a full coat of Resene Quick Dry as an undercoat before applying the waterborne enamel topcoats.

October 2018

Q. Are water based enamels as long lasting and hard wearing as oil based enamel paint?

A. Depends upon what aspect of durability you are referring to and if the paint is exterior or interior. The time to chalking of an exterior waterborne paint is significantly longer than an enamel paint of the same gloss level. This is not an issue with interior paints.

There is a scale of wear resistance; conventional waterborne paint has the lower wear resistance compared to waterborne enamel with solventborne enamel being the most resistant to wear/abrasion. These comments are a general overview and apply to single component paints only.

September 2018

Q. How do I test to find out whether paint is oil or water based?

A. Clean down an area to be grease/chalk free then wet a cloth of contrasting colour with meths and quickly transfer it to the painted surface and rub. If the paint softens or dissolves then it is a traditional waterborne paint finish. If not then it could be a solventborne enamel or waterborne enamel paint.

September 2018

Q. I was just wondering since I forgot to ask in the shop, if all paint is heat proof? I brought a testpot of Resene Unicorn to put up on my wall as I’m planning on changing the wall colour. I thought with the leftover paint I could do my panel heater but I am unsure if it can go on it and it doesn’t say.

A. If it is the ceramic type, it should be fine.

September 2018

Q. I am looking to print on glass then applying a backing paint. I’m told you have a special paint that is called Resene Imperite.

A. Resene Imperite IF 503 is supplied to the splashback painting businesses. In the past we have looked at the area you are seeking a system for and found that unless the printing inks are totally resistant to solvents, that ink bleed occurs as the Resene product is a solventborne paint. However if a small piece of printed glass is supplied to us, we can test it for you.

September 2018

Q. Please can you tell me how sheen level affects LRV and also is it true that the higher the sheen the darker the perception of the colour? This seems to be the accepted answer, but to me a colour generally seems brighter if the sheen level is higher.

A. Resene testpots are made with a low sheen waterborne paint, there is an impact of gloss level on perceived colour. The same colour made using a flat waterborne paint formulation looks greyer and milkier than the same colour made using a gloss waterborne paint. Higher gloss level paints of the same type in the same colour are cleaner and brighter than the same colour made in a lowest gloss level finish.

Gloss has no appreciable effect on how much light a colour reflects or absorbs otherwise known as LRV.

August 2018

Q. I have dark stained Mahogany Rubberwood and want to blond it or lighten it. Any ideas for what products to use please?

A. Without sanding off the stain colour the only other option would be to try Resene Colorwood Whitewash. Degrease first (not sure if you have used silicone based polishes, if so the residues of these are very difficult to remove), sand the surface to profile then apply the Resene Colorwood Whitewash.

It is essential to get an even wet film thickness and to avoid overlapping when applying as the product is a lightly pigmented clear. Areas of higher application will be seen as areas of increased whiteness.

August 2018

Q. I have just used a semi-gloss enamel and it seems to be a lot flatter than I would have expected.

A. A reduced gloss level usually means that the paint has dried under cold/high humidity conditions.

August 2018

Q. I have two fireplaces (one wood and one gas), they both have a matt black, cast iron surround that has some light rust (wood fire), and some paint marks I can’t remove (gas fire). Can I paint onto the iron to freshen them up - what do you recommend?

A. The only suggestion would be to apply Resene Hi Temp Black Enamel. Carefully sand rusted areas with 400 wet and dry to remove rust first.

August 2018

Q. What is the difference between the Resene X-200 D62 acrylic weathertight membrane and the Resene X-300E D64 high build elastomeric membrane?

A. In the CCANZ CP 01 2014 document there are two options to achieve a weathertight finish over exterior masonry. The first is a conventional high build acrylic paint system, the second is an elastomeric paint system both applied to achieve a minimum dry film thickness of 180 microns. Resene X-200 is the first type and Resene X-300E is the second type. Some believe that an elastomeric paint is the better option, Resene does not subscribe to this. An elastomeric paint system is really only for appropriate to use the situation where there is existing live cracking in a cementitious substrate. The elastomeric paint needs to be applied at 2x the maximum crack width to maintain film integrity when there is crack width changes.

August 2018

Q. I would like to know the shelf life of Resene Lumbersider paint please. By the 'shelf life'. I want to know how long I can keep the paint from when I bought it and it will still be OK to use (stored in good conditions).

A. Not a simple question to answer, if unopened and stored under cool interior conditions but off a concrete floor then at least 5 years. At the end of this time the paint will need to be stirred with a flat stirrer to reincorporate any settled components.

Waterborne paint is prone to bacterial contamination, at manufacture we add an in can preservative to counter this but the preservative can be challenged and used up over time. If the can has been opened for use then the act of opening and use, dipping brushes into etc this can introduce bacteria into the paint can which depending upon the level type of bacterial introduction and this has the potential to see a rapid decline in then in can preservative level to a paint where protection no longer exists.

The nose test will give an indication of bacterial contamination, if the wet paint has an odour similar to unwashed sports socks then this is the odour signal of bacterial contamination.

It is best practice to only purchase the quantity of paint required for a project and use most if not all.

June 2018

Q. I need to repaint some lettering on a granite headstone and would like to know what primer and paint to use?

A. Scrub the lettering down using Resene Paint Prep and Housewash and allow to dry then using a Resene testpot apply two coats to the lettering and using a razor blade shave off paint at the letter edge.

May 2018

Q. We accidentally scratched the wall when moving furniture and the scratch is quite deep. Could you please advise how we can fix it? And also, what is the best possible way to match the paint colour?

A. Use plasterboard stopping compound for filling/repairs and sand flush with the existing wallboard when fully dry. Seal off the repairs with Resene Broadwall Waterborne Wallboard Sealer then apply two coats of the topcoat colour.

Re the topcoat match, there are two elements to this; one is to match the existing colour but also the existing gloss level. In this situation unless you can find the original can of paint, the only way may be to recoat an entire wall or room to achieve a consistent colour.

May 2018

Q. For the Resene Wintergrade paint range, is the paint still low odour paint, or does the quick drying use a quick evaporation material, that has a stronger odour?

A. Both the standard and wintergrade versions have the characteristic waterborne paint odour. The wintergrade version is not simply a change in volatile organic compounds, but a change to a resin system that allows film formation at lower temperatures.

April 2018

Q. Can Fireshield 1FR be applied over existing polyurethaned timber?

A. Yes, as long as the existing polyurethaned timber is sound, clean and thoroughly sanded.

March 2018

Q. I’m a painter and I’m wondering why I seem to have to strain some, as there are bits and pieces through the pail. The paint is new!

A. Plastic pails can develop a skin and we agree that this is an annoying feature for an end user. Skin development occurs as a result of storage at elevated temperatures and has been more of an issue this summer. It can happen if paint is left in a hot vehicle or similar. Resene formulates our paints at higher solids content than other paint providers (paint thickness is not an indication of solids content, only the amount of thickener added) and this exacerbates the skinning potential. The issue rarely occurs over the cooler months. The skin can be removed when the pail is first opened but if the skin is broken up, filtering is recommended.

March 2018

Q. Is it possible to use enamel paint over anaglypta wallpaper?

A. Not the norm now, but in theory can be done as long as the paper is sealed with Resene Sureseal.

March 2018

Q. I have some Resene Deep Purple stain. I want to apply it to a skateboard that I have now sanded down. Unfortunately, it already had a green stain applied to it. How would I go about re-staining it to be purple instead of green? Can I just apply a few layers of Resene Deep Purple right over top of the green staining? Or is there something else I should do?

A. Stains are semi-transparent and this will always change the colour if another stain of a very different colour shade is applied over an existing stain colour. You would need to sand off the entire green stain colour to achieve your deep purple colour with the new stain colour.

February 2018

Q. I have an enamel bucket, which is starting to rust. I do have some paint which I purchased to repaint a children's metal climbing frame, which was starting to rust and am thinking that should be suitable for the bucket after I have given it a thorough clean and sand. Then maybe oil based enamel paint on top of that.

A. We suggest the following: sand rusted areas to remove all lose rust, dust off then spot prime the prepared area with Resene Rust-Arrest.

When the primer is dry, apply a thin coat of Resene Waterborne Smooth Surface Sealer to the sound enamel areas and leave to dry for 48 hours, and then apply two coats of Resene Lustacryl.

February 2018

Q. We have some black steel skirting and angles on the same project. Vertical surfaces are ok but horizontal surfaces could do with some protection. The area is very small and the client accepts it may need cleaning down and recoating every few years.

What would you recommend as a clear finish?

We acknowledge the steel will rust and it will be difficult to get a good bond.

A. Ensure the steel is cleaned to remove grease/oil etc. then apply three coats of Resene Imperite IF 502 Clear. The clear coats will provide no corrosion protection to the steel and this system can only be used for interior steel.

January 2018

Q. Can you please let me know the LRV rating of Resene Tapa with the additive ‘CoolColour’? I can find the rating for Resene Tapa on its own on your website, but not with the additive.

A. LRV is a measure of light reflectance only and given this there is no LRV difference between the non-cool and CoolColour™  version of a colour. What does differ is the TSR (Total Solar Reflectance) of the CoolColour version, the TSR of the CoolColour version is higher than the non-cool version. TSR is a measure of heat reflection and does not have a visible reflection of light component. The CoolColour benefit is relative to the same colour made using non cool technology and does not render the surface cool to touch.

January 2018

Q. I am looking for a paint to go on frosted wire reinforced glass to reduce sun glare/strike. The application is to a commercial building - factory windows that face North West.

I would prefer the exterior to be painted but it can be interior as an option. I would prefer not to completely block out the sun for general natural light in the area.

A. Sorry we do not have a frosted clear coating for this application. For an opaque option apply an adhesion coat of Resene ConcreteSeal 3 in 1 and then two coats of any Resene exterior waterborne paint tined to your selected colour. The colour on the interior face of the glass will be grey (this is the colour of the Resene Concrete Seal 3 in 1).

January 2018

Q. We have a concrete block wall, which has been painted and has leaked although the leaks have now been fixed.

Can we apply the Resene Limelock to the painted wall, or do we have to remove the paint before applying the Resene Limelock?

A. If the lime burn has caused the existing paint to flake/blister, then you will need to remove the coating from these areas, to then seal and topcoat.

Spot prime bare concrete with Resene Sureseal, and then if an exterior wall, spot prime the Resene Sureseal areas with Resene X-200, then apply two full coats of Resene X-200.

If interior, replace the Resene X-200 with Resene SpaceCote Low Sheen.

January 2018

Q. Do you sell a product called orange peel, or is this just the name of an effect? We want to use the product or effect on outdoor tiles, to give a non-slip surface.

A. Orange peel is a term usually used to describe a slight surface texture typically seen with roller application. Resene Walk-on is general purpose paint for concrete that does have slip resistance. Resene SRG Grit can be added for additional slip resistance.

January 2018

Q. I have been using Resene testpots in Metallic Aluminium in a timber toy situation. The previous pots were lustrous and bright and light. The new formula on first use seems duller and does not have that bright silver glitter, lustrous look that I wanted. Can you enlighten me about the new formula?

A. While we have made a change to the aluminium flake used to produce the metallic tint base to achieve better in-can stability, our lab studies have shown that the new metallic base has a bit more sparkle; however it does need a good stir to get it homogeneous.

You are right about the stirring. Whereas with the old formula I got away with a vigorous shake, after a good stir it now appears to be as bright as the original.

January 2018

Q. What is the difference between Resene SpaceCote and Resene Lumbersider paint?

A. Resene SpaceCote is enamel paint and can be used where a tough interior wall, usually ceiling finish is required. Resene Lumbersider is an exterior focused paint based on a waterborneconventional waterborne resin system and is mainly used for painting timber weatherboards and fences.

January 2018

Q. What problems might arise if I mix similar types and colours of paint but with different gloss levels?

A. You can only mix compatible paints; not all waterborne paints can be mixed. If you mix differing gloss levels of compatible paints you will achieve a change if gloss, determined by the relative volumes of each paint. An accurate record of the mixing ratio/volumes should be kept if trying to reproduce the gloss level.

January 2018

Q. If there is very high humidity can this affect the sheen of a waterborne enamel?

A. In very high humidity conditions the film formation could be negatively affected, or there may be a layer of surfactant on the surface. It would be useful to clean the surface and see if the sheen improves. Solventborne enamels can also suffer from low gloss in such conditions.

January 2018

Q. I have a horse harness sulky I want to paint black. The sulky frame is mostly hickory, with some metal. What Resene paint(s) should I use? The hickory is painted and the sulky is in good condition.

A. Sand the painted hickory to provide a mechanical profile for the new paint system. Apply a coat of Resene Quick Dry and finish with two coats of Resene Super Gloss enamel.

December 2017

Q. I've just finished skimming some walls with GIB® Plus 4 and want to apply the correct undercoat/primer between the plaster and acrylic topcoats. Which product would you recommend for this?

A. For dry areas use Resene Broadwall Waterborne Wallboard Sealer.

November 2017

Q. I use many of your testpots with the great variety of colours available but when applied to sealed sanded wood I can’t seem to get a smooth finish. I have tried different brushes bur wonder if there is a better way to a more even finish.

A. The testpot paint is based on a waterborne paint resin and compared to many other similar paints it is formed at a high solids level. We recommend addition of Resene Hot Weather Additive for application of our waterborne paints under warmer conditions.

Added at the recommend level the Resene Hot Weather Additive also gives the wet film an increased open time which should allow for more flow and levelling to occur.

November 2017

Q. When I buy tinted paint am I required to stir the paint again before applying?

A. It depends upon the paint that was tinted, the tints in a stain are prone to settling as the product viscosity is low and this does not help tinters remain in suspension, but irrespective of this, it is always good practice to stir the tinted paint with a wide flat stirrer before use.

November 2017

Q. Can you successfully paint over borer holes (and not have them reappear)?

A. Borer holes are the exit point of the larvae once they mature. So if they are filled and then painted the filled holes should not re appear but often there remains larvae that do bore out in the same or adjacent areas.

October 2017

Q. We’re designing a building to house tanks holding sodium hypochlorite (NaClO). The building is also situated within 500m of the coast.

Although the NaClO is contained within tanks there is some possibility (albeit unlikely) of spills during filling from tankers, and during maintenance procedures. We understand that NaClO is very corrosive to metals in general and particularly zinc.

Due to the building’s proximity to the coast we have specified that all steelwork (portal frames) be hot-dipped galvanized to at least 600 g/m². We do, however, have some concerns about the possible effect of NaClO fumes on the zinc galvanising and wonder whether your company can advise us on the best protection that can be applied to the steelwork, over the galvanising or instead of the galvanizing.

A. Bleach solutions are stabilised with addition of sodium hydroxide which raises the pH to a high level, it is the alkalinity combined with the oxidising feature of the active component that can cause reaction with galvanizing.

A high build epoxy such as Resene ArmourCote 510 will act as a barrier to prevent any reaction due to high solution pH, however epoxies are discoloured by contact with even low levels of hypochlorite. To avoid this we specify a two pack polyurethane topcoat such as Resene Uracryl 403.

We can arrange a Resene representative to prepare a full specification for you if required.

October 2017

Q. I have some old paint that I haven’t used which is around six months old. Can it be returned?

A. We can accept untinted paint returns in the original container, up to three months old. Unopened paint in a can does age over time and will eventually either go off or start to thicken and eventually go hard. We try and aim to keep the stock in our stores well rotated so customers receive fresh stock. We tend to update our label information regularly and sometimes tweaks are made to formulations also.

October 2017

Q. Steel RSJ coated with lead based paint. Which system should be used to contain and finish without stripping?

A. The lead will be contained within the primer, so as long as that primer has good adhesion to steel substrate, then there should be no issues with release of lead into the environment. The key is that if any lead based paint flakes are removed from the surface that all efforts are made to contain this, as per the attached OSH guidelines.

If this is an exterior, any bare areas or corrosion should be spot primed with Resene Armourzinc 120, followed by two coats of Resene Uracryl 403 (a test patch should be done to confirm compatibility with existing product).

If this is an interior, spot prime any bare areas of metal or corrosion with Resene GP Metal Primer, followed by two coats of Resene Lustacryl (a test patch should be done to confirm compatibility).

September 2017

Q. Can I topcoat with Resene waterborne semi-gloss enamel, over what I think is oil based paint, on interior trim or do I have to use an undercoat?

A. Our Resene Lustacryl waterborne enamel will adhere well to aged interior enamel if sanded thoroughly, but we always recommend a tie-coat of Resene Quick Dry primer undercoat.

September 2017

Q. I’m looking for advice on painting services lagging. We have Amarflex around pipes which are exposed to view for a portion of the ceiling.

A. Armaflex when exposed to weathering needs to be painted to protect the cabling from UV exposure. Any Resene waterborne paint can be used, for exterior it is usually an elastomeric paint such as Resene X-300E. For interior two coats of Resene Zylone Sheen will give the decorative finish and application by brush is the only practical way to apply the paint.

August 2017

Q. I'm looking for an etch primer for cast aluminium boxes. These are Hammond enclosures generally, for guitar pedals. I have read a lot about window joinery in the FAQ but this is bare aluminium, and I will be covering it in a combination of testpots. Do I want Resene Vinyl Etch, Resene GP Metal Primer or something else? I will be spraying it on, 500ml is more than enough and I would prefer something white.

A. Degrease using Resene Interior Paintwork Cleaner following label directions then apply a thin coat of Resene Vinyl Etch primer.

August 2017

Q. Is Resene Lumbersider somewhat flexible? Or can an additive be added to increase its flexibility?

A. Resene Lumbersider is based on a conventional waterborne resin system, the resin system is not classified as elastomeric. Resene Lumbersider is extensible but not elastomeric.

We cannot alter the film properties of Resene Lumbersider to create a truly elastomeric paint. Resene Lumbersider can be brushed, roller and sprayed.

August 2017

Q. I was dangerously exposed to 2 pot urethane foam about 40 years ago and was sensitised to the styrene. About 20 years ago I used a urethane varnish and had a moderate wheezing reaction using a proper filtered mask. I wish to brush paint some Aquaclear waterborne urethane varnish and wonder whether Resene is aware of it affecting old-fashioned urethane sensitised people. My reaction was extreme asthma like symptoms. I will use a mask and will be well ventilated but would like a practical answer, not a commercial take no risk approach.

A. Free isocyanate can cause sensitization which is seen as an asthma type reaction. However the sensitization only occurs if the isocyanate is inhaled as an aerosol. During spray application. There are a range of different isocyanate hardeners used each with a different sensitisation potential.

Resene Aquaclear is a low VOC (volatile organic compound) clear and contains no isocyanate in the manufacture of the resin or product so I see no reason why any isocyanate related reaction is possible with the product. The term urethane does not refer to isocyanate containing.

August 2017

Q. Does Resene Lustacryl come in other bases apart from white so can be tinted to a darker colour?

A. You can get Resene Lustacryl tinted to almost all Resene colours.

July 2017

Q. I have heard you can wipe an oil based primer applied in less than perfect weather with turps to remove the oily layer so the topcoat sticks better. Is this correct?

A. It is an old painters' trick to remove any oily material from the primer. Under marginal conditions oil based primers can cure with an oily surface layer and this is can cause cissing of waterborne topcoats. Wiping with turps is the way to remove the oily material to overcome cissing when topcoating with a product such as Resene Quick Dry waterborne primer undercoat.

We recommend Resene Thinner No.2 as it is lower odour and a safer alternative to turps.

July 2017

Q. Is there a problem using enamel paint on primed aluminium in winter?

A. The dry times of both solvent and waterborne paints over a cold metal substrate will both be extended. The real issue for exterior painting is the danger of condensation occurring due to dew point conditions.

July 2017

Q. With the colder weather and longer drying times, is there an additive for such paints as Resene X-200, Resene X-400, Resene Sonyx 101 and Resene Lumbersider to speed up drying?

A. Resene makes Resene Wintergrade Additive which can be added to many Resene waterborne paints to help them cure in cold conditions. See our Wintergrade page for more information.

June 2017

Q. I am about to renovate a single bay villa in Herne Bay. I would like to paint the inside and outside white, including all trims. The door would be black. All picket fences would be white. The roof I would like grey. I will replace some of the roof with COLORSTEEL and paint the rest. I am unsure of what paint to use - it will be professionally painted but I would like to make sure the right paint is used. Most of the exterior of the villa will be built with new wood.

A. I recommend using Resene Lumbersider for new fence timbers, for remaining new timber (except LOSP treated timber) apply a full coat of Resene Quick Dry waterborne primer undercoat and for exterior weatherboards finish with two coats of Resene Sonyx 101.

For the door, apply a full coat of Resene Quick Dry waterborne primer undercoat and then two coats of Resene Enamacryl CoolColour™ in Resene Black. For interior woodwork, apply a prime coat of Resene Quick Dry waterborne primer undercoat and finish with two coats of Resene Lustacryl.

For new plasterboard (excludes wet areas) apply a coat of Resene Broadwall Waterborne Wallboard Sealer and finish with two coats of Resene SpaceCote Low Sheen. For wet areas apply a coat of Resene Sureseal, then Resene Quick Dry waterborne primer undercoat and finish with two coats of Resene SpaceCote Low Sheen Kitchen & Bathroom.

June 2017

Q. What is the recipe to paint shoes with water based paint?

A. I am not aware of any specific formulation, but people have used Resene testpot colours for a temporary colour change.

June 2017

Q. How do you test block resistance of waterbased paint?

A. In simple terms two painted surfaces are allowed to cure then placed together, paint to paint and then weights are placed onto the panels and left for a time then the weights are removed and the painted items are then separated. If there is a clean break then the paint has block resistance.

May 2017

Q. Do you make a solvent based exterior semi-gloss enamel?

A. Semi-gloss solventborne enamel paints are not usually supplied in NZ. They undergo very rapid chalking upon weathering and for this reason are never recommended for exterior use. However Resene Lustacryl which is a waterborne enamel can be used for exterior painting.

May 2017

Q. Can you tell me what it is that makes paint electrically insulative or conductive? I am wondering if conductive paints have metal in them.

A. Some metallic paints can be electrically conductive but due to corrosion which occurs for many metals, conductive paints are limited to a small number of metals such as silver and nickel. These come at a high cost but provide exceptional performance (high conductivity). Our paint is designed to be cost-effective and conductivity is achieved with ultrafine dispersed carbon. This results in reduced conductivity compared to metals.

Insulation coatings rely on materials which are inherently non-conductive including the film-forming component and various inert fillers. The term dielectric is commonly used with performance based on dielectric breakdown strength (high voltages) and the film thickness is often the characteristic that is most important in these coatings.

May 2017

Q. I would like help navigating the finish of the colours I have chosen. For example, I am not sure how to know or indicate the availability of a specific colour in flat, satin, semi-gloss, etc.

A. Resene colours can be tinted in most Resene paint finishes both interior and exterior application. We do not have specific colours for a product or limits on where colours can be used.

May 2017

Q. I want to make shaped moulds out of MDF and pour concrete into them to set. What do you recommend I seal the MDF with to stop it swelling while the concrete sets?

A. The only suggestion would be two coats of Resene Armourcote 221 but we cannot guarantee this will give efficient water barrier to avoid MDF seeping.

May 2017

Q. Once a Resene two pack epoxy topcoat is fully cured, could I sand small sections of it and apply highlights using enamel paint?

A. Single pack solventborne enamels often do not cure well when applied to epoxies. There are components in most epoxy paints that can impair the curing of the enamel.

May 2017

Q. Do you make a solvent based exterior semi-gloss enamel?

A. Semi-gloss solventborne enamel paints for exterior use are not recommended. They undergo very rapid chalking upon weathering and for this reason are never recommended for exterior use. However Resene Lustacryl which is a waterborne enamel can be used for exterior painting. For interior use we do have a semi-gloss solventborne enamel – Resene Lusta-Glo.

May 2017

Q. I would like a high gloss red paint to paint an old camphor box.

A. Resene Super Gloss would be our highest gloss level topcoat finish.

May 2017

Q. I am part of a volunteer group that is restoring an old cemetery. Some of the more modern granite headstones need the engraved lettering repainted. What primer should we use and what type of paint for the topcoat? Does it need priming?

A. We have used the following for the purpose you have requested. Ensure the lettering is clean from all contaminants then re-apply colour using Resene Lumbersider. Using a sharp blade, remove areas outside of the lettering.

We have found that the profile of the cut out lettering does not require priming to achieve adhesion of the Resene Lumbersider.

April 2017

Q. What is the difference between thinning Resene Sonyx 101 paint with water and with Resene Hot Weather Additive?

A. Water thinning has an effect upon product viscosity and does not give a real extension of open time of the wet film.

Resene Hot Weather Additive may look like water but it is not. Addition of Resene Hot Weather Additive will extend the open time of the wet paint film to increase working time and also flow and levelling.

March 2017

Q. Are the colour charts made from the actual paint? Will the colour look real to the actual paint?

A. The colour chips on Resene paint colour charts are actually made using our paint which gives a more accurate result. Most people find it hard to visualise how a small chip will look on a wall. In our ColorShops we have a full colour library of A4 swatches of Resene colours that you can view. This is a great way to see more of a colour and have a better idea of how it will look in a larger scale.

Whether you use the paint inside or outside can also have an effect – a paint colour used outside tends to look lighter than the chart because the sunlight washes the colour out. Inside colours tend to look darker because there is not as much light.

March 2017

Q. My painter says for a light colour he will have to do extra coats? How many coats are needed?

A. Normally two topcoats are sufficient for most colours. However, sometimes depending on the application tools and technique, the paint can get spread thinner, which means it takes an extra coat to colour.

To address this, we have a Resene Varishade undercoat colour that we recommend be used as an undercoat under light colours. This provides an even surface colour for the topcoat to go over and usually means two coats of tinted topcoat only.

March 2017

Q. What is the effect of watering down waterbased paint?

A. Thinning up to 10% of a waterborne paint with water should have no effect upon stability of the thinned paint. However when applied to vertical surfaces there will be a lower wet film thickness that can be applied before runs or sagging occurs. When paint is thinned the dry film thickness per coat will be reduced and this may require additional material to be applied to meet data sheet dry film thicknesses. Note that excessive thinning can destabilise the paint.

March 2017

Q. At 14 sq. metres per litre how many microns is the coat of paint? Also the same for 16 sq. metres?

A. There is no direct relationship between coverage expressed as sq metres per litre and dry film thickness, you need to have the volume solids of the paint to do this: Coverage = volume solids x 10/dry film thickness.

February 2017

Q. During the last 9 months I've used quite a lot of solvent paints such as Resene Sureseal and Resene Enamel renovating three houses. What I've found is that the solvent paint produces a heavy skin on top of the paint inside the can and also on the sides of the can. This means that I have to get rid of them every time when I use them and resulting in lumps and wastage of lots of paint. I do close the lid pretty tight. I was told that this is the nature of solvent paint.

A. The skinning is akin to drying of the paint when applied. The paints require air to cross link/harden and a partially full can will have more than sufficient air to see the surface of the paint skin.

There are only two possible options, ensure the can is well sealed and invert or to re can into a smaller sized sealed can.

February 2017

Q. Can I put waterborne enamel over enamel paint?

A. Yes, as long as the existing enamel is thoroughly sanded and then, for best adhesion primed with a coat of Resene Quick Dry waterborne primer undercoat.

February 2017

Q. Can you apply stain by airless spray gun? Or is it best done with a speed brush?

A. As stain penetration is a key requirement at least the first coat should be applied using a speed brush. The stain is formulated at a low viscosity and this will make airless spray application and avoiding runs/sags a real challenge.

January 2017

Q. Is it ok to spray Resene Enamacryl with a pressure pot? I want to coat some radiators using it; they are too small for an airless and I will brush and roll if I cannot.

A. It can be sprayed with a pressure pot but you will need to use a 1.8mm or greater. Some judicious thinning with water may also be required to achieve good atomisation.

January 2017

Q. I am teaching a class how to make paints. I’d like to know - what is in solvent? What is in pigment? What is binder?

A. Paint can be anything from a coat of linseed oil to a sophisticated baked on silicone enamel for painting space shuttles.

Solvents - make the paint easier to handle and apply. Some solvents make paint hazardous so require good ventilation. A solvent is the substance into which another substance dissolves.

Pigments - Prime pigments give colour. Extender pigments control gloss level, sandability, texture etc. Anti-corrosion pigments give corrosion protection.

Binder - Can also be known as a resin, a latex or as an oil etc. It holds the paint together. It forms a continuous film and provides adhesion. A binder gives the paint its important properties especially with regards durability.

  • Convertible binders: these change as they dry. The binder is converted into a different chemical structure e.g. alkyd resins or 2 pack paints.
  • Non-Convertible binders: These don't change chemically as they dry e.g. lacquers.

January 2017

Q. I have some paint I want to use that I think is about 3 years old. What is the shelf life of paint. Is it still ok to use?

A. Our product should be in good order for at least 3 years which is how long we keep our retain samples as part of our ISO accreditation. Most water based products are still quite usable for 5 years+ but it will vary from product to product.

If the product can be mixed easily to a homogeneous consistency then usually it is ok to use. Only concerns are if its lumpy, smelling badly or gelled.

January 2017

Q. I have a stainless steel plate that has the number 16 machined into it to a depth of 2mm. I want to paint fill the number, what do you suggest for best adhesion/fade resistance? The colour is bright red.

A. Apply a thin coat of Resene Vinyl Etch then two coats of any Resene exterior waterborne paint; this includes Resene testpot colours.

January 2017

Q. Are acrylic enamels as good as oil based enamels?

A. Depends upon your definition of good. The exterior durability of waterborne enamels extends to reduced gloss levels, whereas for an oil based enamel a full gloss is the only gloss level that can be used for exterior exposure and even then the paint would undergo rapid surface chalking relatively quickly. Waterborne enamels can be used for opening joinery as can solventborne enamels. Brush marking is a comment associated with brush application of waterborne enamels but this can be markedly reduced. Waterborne enamels will not yellow or suffer embrittlement over time as solventborne enamels do. The only feature which a solventborne enamel surpasses waterborne enamel of the same gloss level is hardness, over time this feature is not an advantage as the solventborne enamel continues to cross link and harden.

December 2016

Q. How would I work out the spreading rate for a range of colours?

A. The spread rates are determined by the spreading rate of the paint not the colour. This s listed on the back of most of our labels, which you can also view online.

December 2016

Q. I have some Resene Aquapoxy 2 pack purchased from two different stores. Some have stickers stating to tint hardener and not the base. I have been told this is incorrect and the base is to be tinted. Can you please clarify?

A. Traditionally it has been the base of a 2 component paint that is tinted for a 2 component products. However this does not apply to Resene Aquapoxy. The recommended component that is tinted is the hardener. This is to ensure the Resene tint criteria are met. Up until recently we did place a sticker on top of the base can, highlighting that it was the hardener that was to be tinted. This was to ensure Resene staff tinted the right component.

December 2016

Q. When spraying Resene Super Gloss enamel with a pressure pot system, not airless, what is the mixing ratio with No.9 thinner and can I use Mineral turps instead?

A. No set volume just sufficient to achieve good atomisation and spray pattern. It will vary with spray set up - I suggest you start with 5% by volume.

November 2016

Q. What type of paint is best suited for painting pallets of wood?

A. Resene Lumbersider would be the best paint for this application.

November 2016

Q. How long can I store the Resene Quick Dry primer and Resene Lumbersider?

A. There is no definitive answer to this as the storage life depends upon storage conditions, if the paint has been used and when used has there been any bacterial contamination. I would say five years at least if the paint is unopened and stored in a cool well ventilated area.

November 2016

Q. Last week I bought a 10 litre paint in Resene Half Concrete. I thought I was sure but I am leaning more towards a darker shade. Am I able to have my Resene Half Concrete paint changed to Resene Double Concrete or Resene Rakaia?

A. The pail you have can be adjusted to either of the colours as long as there has been no paint taken from the pail.

October 2016

Q. How long does leftover Resene Lumbersider last?

A. Difficult to say with certainty but unopened cans if correctly stored can be kept for more than five years. Once the pail is used there is the possibility of bacterial contamination occurring exists and it is not possible to make any predictions on useable lifetime.

October 2016

Q. If I add Terebine to enamel paints to speed up drying in the colder conditions does it affect the finish?

A. Terebine is a drier solution additive which will increase the speed of oxidation of the product. However, in doing so it will also increase the time to embrittlement of the coating and failure through cracking/flaking.

October 2016

Q. Why don’t you have an opposite additive to Resene Hot Weather Additive - something to speed up the drying time rather than retard it

A. Since water based paints dry by a combination of evaporation and coalescence, the best way to improve drying is by good ventilation, good air movement and warm conditions. In exterior situations Resene Umbrella Additive will improve initial set-up time and thus early shower resistance.

October 2016

Q. Can I use my airless spray gun to spray a two pack paint?

A. In principle yes but it will be depend on the paint; as long as the product to be sprayed can achieve higher wet film thicknesses when spray applied to a vertical surface without sagging or curtaining.

September 2016

Q. Can I use 13-year old white interior satin finish acrylic paint that has been stored in its original tin, supposedly well sealed? Does this paint deteriorate in the tin over time? If so how and by how much?

A. The paint will need to be thoroughly shaken to achieve a homogenous mix. If the paint has an odour like sports socks that have been worn for months without washing then this is a sign of possible bacterial contamination. Iif this is the case then the paint cannot be used as bacterial contamination degrades the paint.

September 2016

Q. Why is there a colour difference between powder coating and Resene paint?

A. Powder coat colours cannot accurately match Resene paint colours. We use our own proprietary pigments to produce Resene colours and these are not available or used by companies that supply powders for powder coating.

September 2016

Q. I recently purchased a property. The previous owner left many tins of Resene paints behind. Most of them were purchased two years ago. I wonder if I can still use them now?

A. If the paint has been stored in a well closed tin under cool conditions it should still be useable.

August 2016

Q. Do you have an anti mould paint that is suitable for polystyrene?

A. We have an additive for mould inhibition that can be added to any Resene waterborne paint when tinted at selected Resene ColorShops. If there is existing mould issues this will have to be treated with Resene Moss & Mould Killer diluted and used to label directions prior to painting. When using the Resene Moss & Mould Killer solution for interior applications ensure that all carpets and furnishings are covered.

August 2016

Q. Do you have a rubberised coating that would go over 20 year old butynol?

A. We do have a Resene paint system for butynol, but the system is decorative only and will not alter the waterproofing status of the substrate. The system is to scrub down using Resene Paint Prep and Housewash diluted and used following label directions. Then apply a coat of Resene Membrane Primer and finish with two coats of Resene Lumbersider CoolColour™ version of the colour you have selected (if available).

August 2016

Q. I have about three litres of Resene Summit Roof left over. Can I use this as the first coat over primed timber decking? I'm going to use a similar colour for the decking and would like to find a way to use up the left over Resene Summit Roof. Alternatively could I use it as a windowsill paint?

A. In theory yes but in practice I would say no, unless you are planning to use a waterborne coating such as Resene Lumbersider for the final coats.

July 2016

Q. How long does paint keep? I am away at the moment but want to buy paint to interior decorate while I have tenants.

A. Difficult to put an exact time on this but all paint should be stored in a cool well ventilated area and with a tight closed lid. Waterborne paints can undergo bacterial contamination which can render the paint unusable. There is a greater potential for this if the paint cans have been opened and a part can is then stored. Bacterially contaminated paint has an odour reminiscent of unwashed sports socks.

July 2016

Q. I bought some Resene Lumbersider and do not like the colour. Can this be tinted to a darker colour and can it be used on an iron roof?

A. We can only add limited amounts of colourants to alter the colour. It depends upon what colour you are after. We usually do not recommend Resene Lumbersider for roofs as it is a low gloss product and the onset of chalking will be sooner than a higher gloss dedicated roof paint.

July 2016

Q. How soon after sandblasting a steel beam can you apply paint?

A. Before the freshly blasted surface dulls off. Here the recommendation is usually within four hours of blast cleaning; however this is humidity dependent.

July 2016

Q. Just a quick question about painting. When I paint a single coat of paint on an object will the paint be exactly even? What I mean is will the wet paint disperse evenly so you could put a spirit level on it after it has dried and it would be exactly level?

A. The degree of levelling depends upon the paint type and how it is applied. One coat of a standard paint is equivalent in thickness to about half the thickness of cello tape. Most solventborne topcoat paints do have sufficient open time to achieve good flow and levelling of the applied wet paint film. Waterborne paints set up at a much faster rate than a solventborne equivalent and this can often see a reduced open time for the applied wet paint film to achieve flow and levelling. There is also a range of open times that exist within waterborne topcoat paints. The initial drying of a waterborne paint is the loss of water from the wet paint. Application of waterborne paints under application conditions of elevated temperatures and reduced humidities will reduce the open time as the wet paint film will set up and dry quickly due to a quick loss of water from the wet paint. Resene sell Resene Hot Weather Additive to extend the open time of our waterborne paints when the paint is applied at elevated temperatures and lower humidities. In general the flow and levelling of waterborne points do not achieve the same degree as a solventborne analogue. The application method must also be considered. For the best level of finish waterborne paints should be spray applied as this application method will give the deposition of an even wet film of paint onto the surface. Roller application will always give a slight orange peel effect but the selection of roller sleeve does impact upon the level of orange peel. Brush marking upon drying is a common outcome of brush application of waterborne paints, even with good lay off technique and addition of Resene Hot Weather Additive. The very fast set up of waterborne enamels can make achieving a completely brush free finish very difficult.

June 2016

Q. Can you spray paint using normal acrylic paint? If so how many undercoats and also finishing coats? For use on MDF.

A. Standard waterborne paints can be spray painted; spray equipment will vary with product and the substrate to be sprayed. General practice is to apply a seal coat and then a single spray coat of topcoat paint.

June 2016

Q. Can I put a waterborne enamel over an old enamel surface?

A. Yes but the old solventborne enamel needs to be thoroughly sanded and a coat of Resene Quick Dry waterborne primer undercoat applied.

June 2016

Q. I have bought metallic paint from you in the colour Resene Obelisk and have got someone to spray it for me but the metallic is not showing through. How do I fix this?

A. When spraying using an airless spray unit there is a lot more material coming through and in some cases if you apply a heavier coat the metallic flake can sink back into the film. By standing back between 600 - 800mm from the wall, using a FFT414 tip and applying a tack coat to build it up to a light even wet film will help. It is a lot easier to control when using a pressure pot unit as the volume is easier to keep up with (not a gravity gun as you would need to fill it too often and may lose the wet edge as a result).

June 2016

Q. What kind of paint do you recommend for painting wellies? (gumboots, rainboots etc.) I need them a bright yellow, but after a month of searching I can't find any already in that colour, so I have to make do and paint my own.

A. The only possible system would be to apply a coat of Resene Membrane Roofing Primer and finish with two coats of Resene Lumbersider. However we do not sell small sizes of the primer coat. We cannot give any undertaking as to how long this paint system will last in this situation.

June 2016

Q. Is there any difference in the surface produced by using a waterbased enamel paint with low sheen and a semi-gloss waterborne enamel?

A. Waterborne enamels can be produced in a range of gloss levels, semi-gloss refers to one of these. The term waterborne and water based are used interchangeably.

June 2016

Q. I am looking for an impasto type product with which to coat the side edge of a concrete path. The path will have stone tiles on top but I need to tidy up the sides. Plastering would be ideal but there is a recess formed into the sides that will house rope lighting. Basically plastering will be too heavy and difficult to apply. Waterproofing properties are not important.

A. Resene X-400 would be the closest product we have to an impasto type of paint.

June 2016

Q. What sort of paint are the tester paints made out of? Is it concrete paint?

A. The testpots can be used for painting concrete as long as the concrete is first sealed with Resene Sureseal. Most Resene testpots contain Resene Lumbersider low sheen exterior/interior paint.

June 2016

Q. I'm looking for a colour to match a cmyk colour our graphic designers are using for an exhibition. Do you have a colour in your range or can this be done?

A. You can look this up on our website to find similar Resene colours. Paint colours don't normally perfectly match CMYK (they are different colour systems) so we recommend that you view physical swatches of the colours to check they suit. Go to and then type in the CMYK you are looking for. Then click search and it will bring up suggestions.

June 2016

Q. I have 2 x 10L pails and a 4L pail of Resene Sonyx 101 (three different shades of Resene Joss) which was mixed in 2009. I have not opened the pails to check them but would the paint still be usable or should I recycle and buy new pails? I have a small area to paint and there may be enough in a pail to do the task.

A. Provided the containers have been well sealed, there should be no problem with the paint.

May 2016

Q. Please advise surface preparation and requirements for recoating of Resene Uracryl.

A. One of the many advantages of the Resene Uracryl coating systems compared to conventional systems is that the topcoats are recoatable with themselves into future maintenance timetables provided that the surface is sound and any pigment oxidation and other surface contaminants are removed, usually by using Resene Paint Prep and Housewash or similar precleaners, then simply overcoating with your selected Resene Uracryl.

May 2016

Q. Can Aquapoxy be colour tinted and is it low sheen or gloss?

A. Resene Aquapoxy is only available in a gloss and semi-gloss finish and both can be tinted to a series of colours tinted off the white base.

May 2016

Q. Do you have a product that I can use to paint over Butynol to help protect against U.V. damage?

A. Yes, prime with a coat of Resene Membrane Primer then apply two coats of Resene Lumbersider.

April 2016

Q. Can I get my tin of Resene Lusta-Glo made for exterior is well?

A. Sorry but no, for an exterior semi-gloss finish we recommend Resene Lustacryl which is suitable for exterior exposure.

April 2016

Q. Resene Lumbersider and Resene Sonyx 101 - which one would fade faster than the other one?

A. Fading is colour related and will be the same for both. However Resene Sonyx 101 as a higher gloss level product will take longer to start chalking compared to Resene Lumbersider in the same colour and exposure.

April 2016

Q. When painting glass is it good to thin the paint so it sprays without spitting and put on more than two coats?

A. When spraying all paint should be thinned with the correct thinner to achieve good atomisation. Paint should be applied to achieve recommended coverage.

April 2016

Q. If I get a drip using latex paint how long should I wait to sand and repaint?

A. Some waterborne paints never really get hard enough to sand or if sanded can soften and glug up the sandpaper. Wet sanding using wet and dry paper is the best way to sand back and this can be done after a few days of drying.

April 2016

Q. Is it normal to be leaving brushstrokes in Resene Lumbersider? I'm using a good brush and not painting in the heat of the day.

A. Resene Lumbersider is a relatively thick paint. This has been maintained over the years in formulation upgrades as this feature is seen as a positive in the market place. But yes, there is a degree of brush marking, however not usually seen when viewed from a distance. If you want to avoid this add 5% Resene Hot Weather Additive or water and see if this improves the brush marking.

March 2016

Q. Which is whiter: Resene Enamacryl or Resene Super Gloss?

A. Resene Enamacryl is whiter than Resene Super Gloss but the latter will provide higher build and thus could look whiter depending on the colour of the substrate. Unfortunately, substrate effects are regularly overlooked. Oil-based enamels can yellow over time as they age, so a waterborne paint will tend to stay looking whiter.

March 2016

Q. I'm after the mixing codes/formula to give your shop to make me up one litre of 'Gray 18' (middle gray). This is a colour used to meter colour and exposure for photographic calibration in post production.

A. Gray 18 as defined by 18% gray card is the same as our Resene Quarter Fuscous Grey. Note that the colour will vary with the screen monitor. We recommend trying a testpot of it.

March 2016

Q. Are Resene products formaldehyde free? Are they quality?

A. Resene Environmental Choice paints are all formaldehyde free. See our product range.

Resene paints are specifically developed to meet the unique challenges of the local environment using the best quality resins and pigments to deliver the best durability and colour.

March 2016

Q. What is the technical 'description' that describes the best possible interior paint finish, particularly with regards to a ceiling that gets sunlight reflected over it?

A. Critical lighting is the term used to describe areas where light falls on the surface at low angles. A level 5 plasterboard finish is required and painted with a matt or flat paint. The best finish will come from spray application irrespective of the paint used.

March 2016

Q. If the materials that make paint are combined, excluding any pigment, what would the paint be?

A. Paints without pigmentation are varnishes or clears.

February 2016

Q. I need a primer for painting polyurethane foam. Then what type of topcoat?

A. Prime with Resene Quick Dry waterborne primer undercoat, then topcoat with two coats of any Resene waterborne topcoat that suits the environment.

February 2016

Q. I specifically requested that the painter use a Resene colour to paint a new built-in wardrobe. As another painting company is painting the rest of the house I requested the painter reconfirm the actual paint colour used. I was told that Resene Quarter Parchment was used, made by another company. From looking at the Resene website I feel that this paint formula does not match Resene Quarter Parchment at full strength. I would appreciate you letting me know if the painter used the correct Resene paint colour and strength, and if not whether it matches a Resene colour.

A. What you have experienced is an altogether common event. However choosing colours from a web site is always difficult as the colour reproduction of a screen is often poor. Suggest you obtain a Resene testpot of the Resene colour to check colour variation.

The only way to get the correct Resene colour is to use a Resene paint and Resene colour tinters. If the painter has used another product then they cannot get the exact same Resene colour because they have the incorrect paint and they won't have the same tinters or the correct Resene colour formulation.

If you have asked for a Resene colour/product on your project then you should be able to request that the painter uses what you asked for and does not substitute another product. If you asked specifically for Resene when the job was quoted then any extra product or labour cost would normally be paid for by the painter if they have not used the product you had requested.

January 2016

Q. I have something that is powdercoated in Appliance White. Can you tell me the matching Resene paint colour as I want to paint my walls to match?

A. We have a colour match on file for this colour using Resene paints and tinters. It's not a standard Resene colour but is made to match the sample of this colour our Colour Lab has. This is available for tinting at Resene ColorShops and Resene resellers.

Just be aware that different finishes can look a little different because of the sheen level and texture. Normally we recommend choosing a complementary colour rather than an identical colour, as even the exact same colour can look different when it is in a different finish.

January 2016

Q. We have purchased 20L of Resene Half Mondo instead of Resene Quarter Mondo. The shop suggested we add 10L of white to make the Resene Quarter Mondo. Can you confirm this is correct ?

A. The only way to adjust the colour is by addition of an equal volume of white. I suggest that you do a bulk adjustment to ensure a uniform colour.

January 2016

Q. Is it possible to paint over existing Seratone® (or similar product)? I am on a limited budget and won't be able to replace the wall linings for several years so would like to paint them in the meantime. It's sort of a yellow and white pattern, and horrible next to the new grey wallpaper.

A. Using Resene Interior Paintwork Cleaner ensure the surfaces to be painted are clean and free from grease, paying particular attention to hand contact areas.

Apply a thin coat of Resene Waterborne Smooth Surface Sealer and allow to cure without water contact for at least 48 hours before overcoating. Then apply two coats of Resene SpaceCote Low Sheen. Roll all coats using the recommended roller sleeve.

The new paint system will take five days to develop good initial adhesion and continue to cure for an additional three weeks until full cure occurs. In the early stages the paint surface will not have good resistance to cleaners or abrasion as these features develop as the film undergoes curing.

January 2016

Q. How long does leftover Resene Lumbersider last? I am not sure what amount to buy - 4L might just be enough or 10L with lots left over.

A. Difficult to say with certainty but unopened cans if correctly stored can normally be kept for more than 5 years. Once the pail is used there is the possibility of bacterial contamination occurring exists and it is not possible to make any predictions on useable lifetime. Given that the repaint time for Resene Lumbersider is in excess of 5 years storage of used cans has its risks.

December 2015

Q. Can testpots be mixed? i.e. red and blue to make a good purple etc.?

A. Yes they can be. Most of the solid colour testpots are Resene Lumbersider.

December 2015

Q. I have half a 20L of acrylic some years old that seems to have thinned considerably. Is it past its useful life? Painted on to the original surface as a touch up it’s much lighter than the original.

A. Difficult to definitely say if the paint is still usable. On storage waterborne paints can settle and develop bacterial contamination. Before using stir thoroughly to re incorporate settled solids. If the paint has an odour reminiscent of unwashed sports socks then this is due to bacterial contamination and the paint cannot be used.

December 2015

Q. What is the shelf life for your Resene Quick Dry waterborne primer and Resene Lumbersider CoolColour™? I have two 10L unopened tins that were purchased around two years ago. I haven't opened either although the contents sound ok.

A. We don’t state a shelf life for the products; however if the pails were stored in a cool area they should be perfectly useable after 2 years.

November 2015

Q. Can I use an enamel paint over an acrylic undercoat?

A. Yes you can over Resene Quick Dry Waterborne Primer Undercoat and Resene Acrylic Undercoat.

November 2015

Q. I have a gloss black fibreglass ice box lid that I want to paint gloss white. What prep and paint product should I use?

A. Sand to de-gloss then apply a coat of Resene Armourcote 221 and two coats of Resene Uracryl 400 Series topcoat.

November 2015

Q. I am wanting to backpaint glass panels, and need a paint that will adhere properly.

A. We recommend using Resene Imperite for painting glass.

November 2015

Q. I was wondering if you could help me. I would like to buy some paint for my DIY project, and Resene is my preferred brand. However there is no way that I will need an entire litre of each colour that I plan on using. I have therefore decided to use the sample paint pots, as these come in smaller sizes. Could you please tell me whether the sample paint will still have the same great quality that I am used to in Resene products? Can it be used in the same ways as regular paint?

A. The waterborne paint in Resene testpots is the same quality as standard Resene paint lines. Most of the paint is Resene Lumbersider.

November 2015

Q. If you have a blister underneath the topcoat layer, but above both a primer layer and an adhesion promoting layer all above the substrate and the blisters actually contain a liquid, what could be the root cause?

A. A couple of possibilities - paint caught with moisture before the topcoat film had fully formed to the point of moisture sensitivity or low topcoat dry film thickness. A paint film can be touch dry and appear dry but still be undergoing film forming reactions and may not be far enough along the cure mechanism to be resistant to water. Curing is a function of time, temperature and humidity.

November 2015

Q. How can I test old paint to know if its water based or oil based?

A. Conventional waterborne paints will soften or dissolve on contact with methylated spirits. To test clean down an area to ensure it is free of contaminates including any surface chalk. Wet a cloth with meths and immediately transfer to the painted surface and rub. Check if there is colour transfer to the cloth or whether the paint is sticky. If there is no colour transfer or softening then it is not a conventional acrylic paint.

November 2015

Q. Do Karen Walker paints cost more? I have had a house fire and all but one side is damaged. Would you recommend repainting all sides or just the fire damaged side?

A. The Karen Walker testpots are a little more expensive, but the paint colours are the normal price as other Resene colours. Whether you do one wall or four depends on the existing condition of the other three walls. If the new wall once painted will blend in with the other three, then you could just paint one wall. If the new wall will look markedly different colour wise, then we'd normally recommend you paint all walls to get a consistent look.

November 2015

Q. We are looking at colours on your charts. The LRV value is shown on back. If the colour we are looking at is available in CC (CoolColour) is the LRV a different value than the one shown on the chart?

A. LRV is a measure of light reflectance only, so no, there is no difference between the LRV of a non and CoolColour™ version of a given colour; however the TSR, total solar reflectance, which is a measure of heat reflectance, is higher for the CoolColour version of a given colour compared to the non-cool version. There is no linear relationship between LRV and TSR.

October 2015

Q. Can I paint over a turps based topcoat with acrylic undercoat and then use waterbased enamel?

A. Yes but you will need to sand the enamel basecoat first then apply the Resene Quick Dry waterborne primer undercoat.

October 2015

Q. With regards to Resene Armourzinc 110 (RA23), can you confirm the durability or time to first maintenance/touch-up? It has been proposed to use this product with a single brush application. It will be applied to repair HDG steel pipe during the construction of the pipe system.

A. Depends upon surface preparation level. Would probably require two brush applications to achieve a DFT of 75 microns. Resene Armourzinc 110 has a 90% zinc content to the dry film and therefore offers great galvanic protection.

September 2015

Q. Is there any problem with painting waterbased paint over oil-based paint? It is exterior and has been sanded.

A. We recommend that you apply a coat of Resene Quick Dry waterborne primer undercoat to the sanded dust free enamel.

August 2015

Q. Which is the darker colour – Resene Solitaire or Resene Double Solitaire?

A. The double versions of colours are always darker.

August 2015

Q. Will a waterborne full gloss paint stick, cover and match a two pack epoxy paint?

A. Depends upon the epoxy recoat time. It's always best to degrease an epoxy and sand it before topcoating with any standard waterborne topcoat.

August 2015

Q. What paint can I use to get a chalk paint style finish?

A. You can achieve the finish with Karen Walker Chalk Colour paints from Resene ColorShops or you can try Resene SpaceCote Flat with the added benefit of it being a waterborne enamel so it is block resistant and can be used in wet areas (e.g. bathrooms, kitchens etc).

August 2015

Q. How do I know if a paint is waterbased or oil based?

A. Clean an area down to ensure it is chalk free then take a cloth and wet it with meths and rub the painted surface. If the paint dissolves or there is pigment transfer to the cloth then it will usually be a waterborne coating.

August 2015

Q. Can I get an accurate RGB for a paint colour?

A. Some paint colours translate better to RGB than others. If they are purely using them for visualisation/renders and then physical samples are used for the final choices, that is fine. If you are using it to colour match other substrates you must use the physical colour as a sample, not the electronic colour. Electronic colour representations can and do change device to device depending on colour settings, lighting, screen quality etc.

July 2015

Q. I have just completed a job using waterborne enamel and have found it seems to dry fast and leaves brushmarks.

A. In my experience it is almost impossible to achieve a brushmark free finish when applying waterborne paints to any reasonable sized area. By their nature waterborne paints set up and dry quickly so there is limited time for flow and levelling to occur with brush application.

Waterborne enamels set and dry much quicker than waterborne paints based on conventional acrylic resins and this does mean that achieving a brushmark free finish with the product is even more challenging.

The best way we have found for brushing is to add the Resene Hot Weather Additive at the maximum addition rate, when brushing apply a generous wet layer and lay off but don't go back over the paint trying to remove any brushmarks as this will make matters worse as the paint film will already be part way through its set up phase and flow and levelling cannot then occur.

Flow and levelling is also affected by temperature and humidity. If you are painting indoors do not run a heat pump as this reduces humidity which increases the rate of water loss from the wet coating.

July 2015

Q. What is the effect of permanent marker stains on sheet metal/aluminium die casting surfaces on the adhesion of a subsequent coat of paint?

A. Permanent markers should not affect adhesion but will bleed when overcoated with solventborne and some waterborne paints.

July 2015

Q. Can I put acrylic paint over enamel paint?

A. Yes as long as the existing enamel is well sanded and undercoated with Resene Quick Dry waterborne primer undercoat. Waterborne enamels must be used for wet areas such as bathrooms and laundries.

July 2015

Q. Can I use an acrylic undercoat over a waterborne enamel?

A. If the waterborne enamel is more than one week old then sand prior to applying the acrylic undercoat.

July 2015

Q. Does left over paint expire?

A. Waterborne paint can be contaminated with bacteria and this can be noticed by a very pronounced odour. Paint that has been contaminated cannot be used as the bacteria breakdown the binder (resin). Generally most paints, if stored well, can last at least 5 years. If fully sealed the paint should not dry out but may settle if stored in a cool area off the ground.

June 2015

Q. In the past enamel paint finishes have tended to be for hardwearing areas and wet areas. Will a waterborne enamel be a better harder wearing result compared to my usual Resene acrylic paint finishes?

A. At the same gloss level the hardness is as follows: conventional acrylic < waterborne enamel< solventborne enamel.

June 2015

Q. I am looking for neutral greys. This is for painting light inspection booths.

A. We recommend Resene Concrete.

June 2015

Q. How long can you leave enamel in a spray pot before cleaning?

A. It is not the pot time that would be the issue, it is in the lines and tip. It will depend upon the enamel but a few hours maximum would be the only safe way.

June 2015

Q. If you can recoat a painted surface after two hours, are you still meant to sand in between coats?

A. Rapid recoat is usually associated with a waterborne paint. Sanding of freshly applied waterborne paints is difficult and usually not required. Sanding between coats may only be required if there are bits on the first coat due to dust etc but is not required for adhesion.

May 2015

Q. What is the reason or causes for gloss or sheen changes in areas subjected to cleaning or rubbing?

A. This is due to poor burnish resistance and is usually seen with paints that are formulated at very low gloss levels or paints formulated using soft resins.

May 2015

Q. How do I verdigris a shiny brass light fitting?

A. It is usual to coat the brass with a clear lacquer to prevent oxidation of the brass surface, so any lacquer layer will need to be removed before trying to age the brass. Solvents are used for this but the removal is not always 100% successful. Suggest you try using Resene Polythane Brush Cleaner to remove the lacquer then apply a mixture of white vinegar and salt to the brass surface.

May 2015

Q. Does Resene have paint with corrosion protection properties?

A. The accepted definition of corrosion usually only applies to metals and in particular steel and galvanised metal. We have specific metal primers to give corrosion protection. Resene Summit Roof is a topcoat that has additional anti-corrosion features built into the paint formulation.

May 2015

Q. I would like to know how long the high VOC paints (like oil based enamels) emit gasses when used inside. I have read that moisture cure polyurethane can emit gasses for months. Is that also true with the paints? My painter has said that you don't get such a good finish using waterbased over old oil enamels.

A. The loss of VOC is determined by temperatures and ventilation, and there is no way to predict given the variables. Resene solventborne enamels are now made using a solvent with a very low aromatic content, and thus are better for users and those exposed to the fresh paint from a VOC safety than traditional aromatic containing solvents such as those used in moisture cured polyurethane clears. Changes in room air volumes and exhausting to the outside is the key factor in removal of VOC from a painted room. Not all VOCs present a potential harm particularly in a one off exposure. Just because the human nose detects a new odour this does not immediately constitute harm. In general with good ventilation the majority of VOCs have left the paint film within 48 hours.

May 2015

Q. I have just glossed after dry weather of two days and then sanded then applied two undercoats which were left for adequate time between coats etc. And 48 hours later rain hit and the exterior gloss has bubbled - why?

A. Paint will blister if caught with moisture before film formation has occurred. The drying of a paint film is not simply a function of temperature it is also influenced by humidity.

April 2015

Q. Are solventborne paints, like Resene Sureseal safe to use? We have used some solventborne paint and it seems to have a lingering odour.

A. Resene has a long standing commitment to the replacement of paints with reduced VOC (volatile organic content) paints, however the replacement product must give the customer the same performance as the product being replaced.

We provide label, data sheet, and Safety Data Sheet information for all Resene products and direct users to where this information can be found.

All paints irrespective of type (water or solventborne) must be applied and allowed to cure with good ventilation with VOC's being exhausted to the exterior atmosphere. The human nose is very sensitive to a new odour and can detect very low levels which may be well below any identified health impact. It is also accepted that a one off exposure does not contribute to any health issues.

Resene has introduced lower odour versions of many solventborne paints, including Resene Sureseal. The lower odour paints are formulated using a solvent with a very low level of solvent known as aromatic hydrocarbons. This change significantly increases the safety profile of the paints. We also have a lower odour thinner (Resene Thinner No.2) to maintain the lower odour of thinned paint. If mineral turps was used for thinning and clean up then this would negate the benefits of the lower odour formulation.

I suggest that you try to open all areas to increase air flow to remove any VOC retained in furnishings etc.

April 2015

Q. We are required to provide UV protection for multi-layer polyethylene natural gas piping. Can you please recommend a suitable Resene paint? I understand that solventborne paints are not permitted in this application.

A. Paint adhesion of polyethylene is difficult to achieve; the only way we have developed is to heat the plastic to near melt using a gas flame then topcoating, clearly not appropriate for large areas of onsite piping which contain a flammable material. Suggest you may need to look at a UV resistant pipe wrapping to give the required level of UV protection.

April 2015

Q. Can your Resene Woodsman stain colour (e.g. Resene Iroko) also be mixed as a colour for your regular exterior paints?

A. We cannot match exactly a stain to a solid colour or vice versa. If you bring in a piece of timber with the Resene Iroko on it as a sample of what you want to achieve our Resene ColorShop staff can suggest similar Resene colours.

April 2015

Q. Is there a test to see whether a painter has in fact given two coats of paint to the exterior of a house? Can painting on native wood cause the paint to blister due to the oils of the timber?

A. It's difficult to measure the dry film thickness of an applied paint system to a non-metallic substrate, made more difficult with a repaint.

When dealing with blistering we advise that the blister is cut and the colour on the reverse side of the blister checked to see if it is the same as the topcoat colour. Also check what is revealed underneath where the blister was. This can indicate the cause of the blistering. If there has been a colour change from a pale to a darker colour this can cause blistering on the most exposed elevations as the heat attracted by the darker colour can cause an old paint layer to lose adhesion. This applies to older style homes that have had a build up of paint applied over many years.

In general native timbers are not classed as oily. If there was any oil migration this would be seen as a surface stain or there would be oil in the blister or on the surface where the blister formed.

April 2015

Q. My roof painter wants to use our chosen topcoat colour only on the last coat and use similar leftover paint but of a different colour on the first topcoat. I presume this is cost saving but I am uneasy about this and would have thought two coats of the same colour would be far better and wear much longer.

A. We always recommend using the correct colour for the topcoats, which may be 2 or 3 topcoats depending on colour, surface etc. It would also pay to check that the brand of paint being used is the brand you have chosen. Some painters will colour match in cheaper products and you won't end up with the quality of paint and colour you were expecting. If you are paying for a professional painter, then the cost of the paint is only a very small part of the project cost (generally only 15% or so of the painting project cost). It's best to use a quality paint tinted correctly.

April 2015

Q. Do you make a white paint that does not contain titanium white? It is needed for a historic war memorial. A titanium white paint will be too bright.

A. I would be surprised if there is any white paint that now does not use TiO2 as the main white pigment. If you have a chip of paint, say about the size of a $2 coin or larger we could colour match for you.

March 2015

Q. I had trouble getting a good finish with water based enamels the one time I tried, but it was a while ago, and maybe they have improved. The paint dragged and didn't seem to flow at all. Is there a technique for getting the best result?

A. Brush marking remains an application issue with waterborne enamels vs solventborne enamels. This is due to the quick set up of the wet paint film which gives reduced time for flow and levelling to occur. This is referred to as open time and can be extended by adding Resene Hot Weather Additive at the recommended rate and applying a good thick wet film to further retard set up time. Care is needed with thick wet films as runs and slumping can occur. We are constantly trying to upgrade the application characteristics of our waterborne enamels to get them more aligned with traditional solventborne enamels.

March 2015

Q. I am setting up a business selling funeral products including MDF and pine coffins off the internet. I would like to include a paint set for families who want to decorate their coffins using your paints. Would it be best to buy sets of testpots?

A. Two coats of a Resene testpot would be ideal.

March 2015

Q. Why do colours sometimes seem different from the colour chart to the testpot and actual paint?

A. The colour charts, testpots and formulations are matched to the same colour standard. The colour perceived by the human eye will change with gloss level and this can affect colour comparison. Likewise the amount of colour you see and also the lighting and other things in the space can affect the way you see the colour.

March 2015

Q. I have 2 x 4 litres of Resene Sureseal pigmented sealer that have never been opened and are approx 8-10 years old. I have just put new plasterboard into the garage. Is this paint ok to use on this job?

A. Solvent borne paint does not deteriorate over time like a water borne paint does. However there will be settling and I suggest that you take the cans to your nearest Resene ColorShop and ask them to shake the cans for you before you open them. Then stir with a wide flat stirrer to check that all the settled pigments have been re-incorporated.

March 2015

Q. Looking for a paint system that seals +150um Zinc Spray and can be immersed in concrete and will get wet and dry and will last 50 years?

A. Apply a seal coat of Resene Armourcote 220 thinned 30% to the fresh arc spray to achieve a dry film thickness of less than 10 microns. Then apply a coat of Resene Armourcote 510 to the sealed surface to achieve a dry film thickness of 250 microns. Allow the Resene Armourcote to cure for 5 days before transporting to site and installation.

March 2015

Q. I'm after latex paint, which means latex is the binder, right? How do I know which paints have that?

A. The term latex is now old and used to refer to the paints that were thinned with water. Now we refer to these paints as waterborne paints.

February 2015

Q. I have some Resene Lustacryl waterborne enamel that was purchased 8 years ago and kept in the original tin can. Is it still ok to use?

A. Should be if the tin was not opened for use and stored in a cool location. The only possibility would be bacterial contamination - this can usually be determined by the smell test. If the can contents have a strong odour reminiscent of unwashed sports socks then it's likely to be contaminated and not usable.

February 2015

Q. Is a 1/2 colour darker than a 1/4 colour?

A. Yes, but with some colours the differences can be small.

February 2015

Q. I am getting pinholing on the coat of paint I am applying.

A. Pinholing occurs if the substrate is very porous or application is being done using the wrong roller sleeve. The paint should not show obvious pinholes.

January 2015

Q. I have a Lockwood house and the eaves have gone very golden looking.

A. The colour will be due to the ageing of the polyurethane clear that was originally applied to the eaves.

January 2015

Q. Can I paint oil based paint over water based and water based over oil based?

A. Yes as long as the existing paint work is sound and prepared appropriately and a full coat of Resene Quick Dry waterborne primer undercoat is used before applying either solventborne or waterborne topcoats.

January 2015

Q. Does metallic paint interfere with cellphone reception?

A. There is no paint that will block cell phone signals but I am aware that aluminium foil used as ceiling linings can interfere with cell phone reception. We have not heard of any cellphone reception issues with our metallic paints.

January 2015

Q. The white paint I am using I think should cover in two coats but took three. Why is that?

A. Coverage can be influenced by the paint rheology (thickness), Resene has always adopted the formulation philosophy of trying to deliver to our customers as brushmark free finish as possible without compromising other application features. The type of thickeners we use to achieve this can lead to over extension of the wet paint, which will reduce coverage per coat. Brushmarking is most obvious with full gloss paints. The gloss level of paints can vary within a standard range – e.g. what Resene calls a gloss finish is generally higher gloss than many other manufacturers. The lower the sheen the more the brushmarks are hidden.

When you're painting it is always good to make sure you keep an eye on the spreading rate. All our paint is tested on black and white cards to ensure two coat coverage in white. Even after 1 coat the original colour is mostly covered by most of our products and it is easily obliterated after two coats. If it is spread too thinly then you won't get the normal coverage. Or if thinner or water is added to the paint that will also reduce the coverage.

We generally recommend for large painting projects that you estimate the amount of paint you should be using for each area to make sure the coverage is right. E.g. if you coat 24 square metres in 1 coat you should use around 2 litres of paint. If you find that you are using less then you will need to apply it thicker. Depending on technique some people spread the paint further than others.

January 2015

Q. I am erecting some structural steel. The steel is galvanised and coated with Resene Armourcote 220. Which Resene Uracryl product should I use as the finish coat?

A. You can use either Resene Uracryl 402 (semi-gloss) or Resene Uracryl 403 (gloss). Given that the Resene Armourcote 220 may have gone past the recoat window of the product, wash down the Resene Armourcote 220 with Resene Paint Prep and Housewash and apply a coat of Resene Vinyl Etch before applying the two coats of Resene Uracryl finish.

December 2014

Q. Looking for a paint system for steel and galvanised steel. Does this product galvanise the steel or is the steel galvanised before the product is applied?

A. Paint is normally applied to a galvanised surface. Zinc rich paints can be used as an alternative to hot dip galvanising.

December 2014

Q. I wish to paint cleaned aluminium with Resene Uracryl 403. Can I apply Resene Uracryl 403 direct or should I use Resene Vinyl Etch or Resene Armourcote 221 first?

A. Recommend priming with Resene Armourcote 221.

December 2014

Q. Can I paint over an oil based paint using a waterbased paint? How do I determine if it is oil based in the first instance?

A. The meths test is the easiest way to determine if it is a waterborne paint. Wipe areas down to remove any dirt and chalking. Wet a cloth with meths and quickly transfer to the painted surface and rub. If the paint is removed or becomes tacky then it is safe to assume that is a waterborne paint. You can apply Resene waterborne paints over old sound enamel paint when repainting weatherboards. Wash down with Resene Paint Prep and Housewash, and with 180 grit sandpaper, dust off and then apply two coats of Resene topcoat. Suggest that you contact your nearest Resene ColorShop if there are areas of flaking paint.

December 2014

Q. Can waterborne paints be painted over old alkyds?

A. Application of waterborne paints to aged alkyds is now commonplace with the proviso that the old alkyd is clean, sound and thoroughly sanded prior to application of the waterborne paint finish. Resene acrylics are formulated using adhesion promoters to give the desired level of adhesion. Resene Wood Primer (oil based primer) can be topcoated with any Resene exterior acrylic paint finish after a minimum dry time of 16 hours.

November 2014

Q. Can I use an acrylic tint meant for acrylic sealer to colour 2 pack polyurethane sealer? Will the polyurethane accept the acrylic tint?

A. The colourants used to tint waterborne paints contain additives which react with the two pack hardener and therefore are not suitable for tinting a 2 pack waterborne polyurethane.

November 2014

Q. I have some old Resene acrylic paint that is lumpy/chunky. What can I mix with it to remove the lumps? It's been sitting around in the garage for two years.

A. If you stir well with a wide flat stirrer and you end up with a smooth mix then it should be ok to use. If not then the can seal may not have been sufficient to prevent drying out and if this has occurred then the paint cannot be used.

November 2014

Q. I have 20 litres of Resene X-200 surplus to my requirements. Is it appropriate to use it to paint a weatherboard home?

A. Resene X-200 is not formulated for application to timber or primed timber.

November 2014

Q. Do the testpots of colour come in acrylic oil and watercolor?

A. Most of the testpots are low sheen waterborne (acrylic) paint. We do have some waterborne stains and some metallics also (both waterbased).

October 2014

Q. When visiting overseas I saw a colour chart with a colour I like. I usually buy Resene but really like this colour. Could you please advise if I can get it made up at a Resene ColorShop? I also have a paint chart with it on.

A. If you can drop the colour card off at your nearest Resene owned ColorShop and advise which colour you want matched the card can be sent to our Color Lab for matching. Please ensure you leave contact details for ColorShop staff to contact you when the match is completed.

October 2014

Q. Do the testpots in colour come in acrylic oil and watercolour?

A. Most of the testpots are low sheen waterborne (acrylic) paint. We do have some waterborne stains and some metallics also (both waterbased).

October 2014

Q. I was planning to make a smoker using terracotta pots and then painting them. Will this work?

A. You can only paint things if you can maintain constant hand contact at the hottest time. If you can't do that then we don't recommend painting it. Normally for terracotta we recommend sealing inside and out. If not sealed inside then the moisture off the cooking will come through the terracotta and bubble off the outside paint.

October 2014

Q. Can you please tell me the 'shelf life' of acrylic paint if unopened?

A. Depends upon storage conditions. The cooler the storage conditions the better. Waterborne paints are susceptible to bacterial breakdown. We add in can preservatives to control this but the effectiveness of these is related to storage conditions. Paint will also undergo settling over time but can usually be reincorporated with stirring to restore the original properties.

October 2014

Q. I have an un-opened container of Resene Woodsman Oil that is a few years old. Is this still OK to use and can you thin it down?

A. Ensure that you thoroughly stir the can contents as the pigments will have settled. When this is done the product should be good to go.

October 2014

Q. I have a timber built conservatory finished in an exterior gloss white paint. My problem is that flies defecate on the paint leaving stubborn dark stains that only a cream cleaner will remove and only then if cleaned after a minimum of delay. Do any of your paints offer resistance to this menace?

A. Only suggestion would be to upgrade to a 2 pack polyurethane gloss that would make cleaning easier. You would need to clean down the existing paint coating, assuming it is sound, then apply a coat of Resene Quick Dry Waterborne Primer Undercoat followed by 3 coats of Resene Uracryl 403 Gloss.

October 2014

Q. I am wanting to paint the fabric of a chair and have been recommended latex paint.

A. Latex is a term now replaced by waterborne. You can use Resene Lumbersider for this but we cannot guarantee that the paint on the fabric will not crack when stressed.

October 2014

Q. Can I use Resene Lustacryl waterborne semi-gloss enamel over Resene Enamel Undercoat?

A. You will need to sand the solventborne enamel then apply a coat of Resene Quick Dry waterborne primer undercoat then the two coats of Resene Lustacryl for best results.

October 2014

Q. Does paint that has lost its pigment due to age still retain the paint's protective properties?

A. Colour can be lost due to U.V. exposure - colour fade (the way to check is to wet the surface and if the original colour returns then it is colour fade) or break down of the paint surface, the latter is seen as chalking. Chalking can result in a reduction of the protective properties of the applied paint film.

September 2014

Q. Can I use your colours to mix with epoxy resin?

A. We do have a series of solventbased tinters that can be used for tinting epoxy paint.

September 2014

Q. I have repaired our ring foundation wall and replaced vents. Now it's time for a lick of paint and scraping back old paint etc. till clean dry surface. Once done is there any particular paint we should use?

A. Given there are no weathertightness issues, prime with Resene Concrete Primer and apply two coats of Resene Lumbersider (low sheen) or Resene Sonyx 101 (semi-gloss).

September 2014

Q. What product is in 55ml testpots and on drawdowns?

A. Resene Lumbersider is in most of our 55ml testpots and is also used for the drawdowns screenprinted at our Head Office. Resene SpaceCote Low Sheen is used for most of our colour chart chips and swatches made by our colour chart supplier.

August 2014

Q. There is blistering on my home – what causes it?

A. Whenever we see blistering we always ask the question, if you cut open the blister what is revealed underneath and what is on the back of the blister? This helps identify the failure mode and the appropriate prep to rectify the problem.

August 2014

Q. I understand that you make the Wood-X oil range. We have stained cedar off-cuts. Can they be burnt safely in an indoor fireplace?

A. We can see no reason why not. The only concern may be the fungicide package, however it contains no heavy metals.

July 2014

Q. I am working on the Christchurch rebuild and we are doing a lot of work on concrete elements which have been repaired by epoxy crack injection - tilt up panels, RC beams and RC columns. I am wondering are there any compatibility issues between the crack injection repair and the paint intended to finish the element? What undercoat would you recommend?

A. All two pack epoxy paints, and fillers have a set recoat time after which the epoxy material usually needs to be thoroughly sanded for painting.

Etch type vinyl primers are well established as adhesion primers for non-ferrous metals but also work as an adhesion primer on sound epoxy paints and fillers. Resene has Resene ConcreteSeal 3 in 1 which is a roller or brush applied etch type adhesion primer and we recommend this product as the adhesion primer for epoxy paints and fillers to be coated in most types of topcoat paints with the exception of acrylic epoxies, alkyds and waterborne two pack polyurethane paints.

July 2014

Q. When a professional paint job has been completed using semi-gloss enamel and a brush should you always expect to have brushmarks or is it more likely the quality of the work?

A. There may be some brushmarking in the existing coating that has affected the look of the topcoat.

It is virtually impossible to totally eliminate brushmarking with this mode of application. We have moved to lower odour formulations for our solventborne enamels, the change to lower odour solvents has made the product safer to use.

July 2014

Q. What does the pot life mean for a 2 pack product?

A. Once the two components are mixed the mixed product must be used within the stated pot life. The mixing starts an irreversible chemical reaction. There is no way that this can be avoided. Use of mixed product beyond the stated pot life cannot be undertaken.

July 2014

Q. I'm just wondering where to find the index for your colour pencils, so that when ordering you know what the colours are? Are you able to advise please?

A. To make up a Resene colour using the colour pencils you normally need multiple pencils (so you mix the colours). There is a pencil recipe list on our website – at this link.

Or you can look up the colour in the online colour library and click through to the swatch and the pencil recipe is there.

There are approximately 100 pencils in the set and you can mix and match them to achieve 'pencil versions' of Resene colours. Some people use our recipes and many others mix and match (once you get the hang of the pencils then generally you can blend as you go).

July 2014

Q. The colours on my computer seem to have a mauve look to them?

A. The colours on the computer are all electronically measured from the original colours; however every computer screen will display them slightly differently. Some screens are truer colour than others. The limits of the way computers show colours also means some colours look more like the originals than others. Generally the very light colours and some greens are the most affected.

You may need to clean or adjust your screen to get a better representation of the colour or pop into a Resene ColorShop to view larger physical swatches of the colours.

July 2014

Q. We ordered some paint in the same colour that is already on our house but it looks different when we open the container.

A. When you compare old to new are you comparing the paint on the house or the paint vs the colour chip? Just that the paint on the house may have faded/colour changed over time – which you wouldn't notice as it would be gradual but it would be obvious if you compared old to new.

The first step would be to compare the new paint (dry) to the colour chip/sample of the colour.

If you compare wet paint to dry paint there can be quite a variation, so it's always best to compare dry paint to dry paint. If you find the new paint does match the colour chip but not the old paint, if you bring in the old paint, Resene ColorShop staff can arrange a colour match for you.

July 2014

Q. I need more paint of a particular colour but of course can't find the tin. Original job done about 15 years ago. If I sent pictures of the colour could anybody identify it or one near it? What would the cost be?

A. It is hard to identify colours electronically as the lighting often changes how they look in photos. The best idea is to take a piece of the colour (e.g. a tiny piece off the wall (taken from an inconspicuous spot) to a Resene ColorShop and they can match it for you.

July 2014

Q. Am I able to use your roof paint on wood? Like trim for windows and sills successfully?

A. We have two roof paints, Resene Hi-Glo and Resene Summit Roof. Both can be used for window trims and sills but the timber needs to be appropriately primed; of the two my recommendation would be for Resene Hi-Glo for this application. Neither product can be used to paint opening sashes – we recommend a waterborne enamel such as Resene Lustacryl (semi-gloss) or Resene Enamacryl (gloss).

May 2014

Q. Can you confirm that the Wagner Project 115 with a 515 tip is suitable for applying Resene Broadwall Waterborne Sealer?

A. No not without over thinning the product. We would normally recommend a 517 tip and a sprayer with a flow rate of around 2 litres a minute.

May 2014

Q. What is the difference between waterbased and solventbased paint? Advantages and disadvantages.

A. The main differences between waterborne and solventborne are covered on our website – click here to view.

April 2014

Q. Do you have a paint that stops plastiser migration from PVC?

A. We use our water borne exterior acrylic paints to paint uPVC without any issues arising due to plasticiser migration.

April 2014

Q. What is the difference between water proof and water resistant paint?

A. The terms are often used loosely. However, from the CCANZ CP 01 2014 the following definitions are given: Waterproof the complete and total resistance of a building membrane to the ingress of any water in either the liquid or vapour state. Waterproof Membrane A membrane impervious to water which is placed to prevent the passage of water and water vapour through a concrete or concrete masonry element. Weather tightness: Term used to describe the resistance of a building to the weather. Weather tightness is a state where water is prevented from entering and accumulating behind the cladding in amounts that can cause undue dampness or damage to the building elements. Weather tight coating: A multi coat applied coating system applied to exterior walls to make them weather tight.

March 2014

Q. Have Resene considered reducing the amount of thinners and replacing it with more solids in their solventborne products to reduce the odour?

A. The answer is yes. Our approach has been two fold. The development of low VOC paints has been at the forefront of Resene R&D for the last 30 years. Our policy has been to replace solventborne paints with a reduced VOC version but only if the performance characteristics of the lower odour version meets or exceeds that of the paint being replaced. Our list of Environmental Choice Approved products is extensive. The odour of the majority of decorative solventborne paints is due to the aromatic content of the solvents used to formulate the paints. We have introduced versions of a number of shelf line enamel primers, undercoats and top coats which are formulated using solvents with less than 1% aromatic content. These are sold as lower odour versions and while the total VOC has not changed, they are lower odour compared to enamel formulations using traditional solvents such as white spirits and mineral turps.

February 2014

Q. Can you make up non Resene paint colours or other colours?

A. If you have a sample of what you want matched just bring it into a Resene ColorShop. They can either match it in store or send to our Colour Lab for matching.

February 2014

Q. I have a painted grey steel staircase and want to repaint it. What type of paint should I use (Resene Uracryl) and what colours can I paint it?

Also I have varnished wall panels, and want to repaint in a colour - what prep and paint type do I need to use here?

A. Do you know what the existing paint on the steel staircase is? If not can you check if the existing paint is softened or dissolves when subject to meths? This will tell us if the paint is a conventional acrylic paint. With the varnished areas you can apply Resene Waterborne Smooth Surface Sealer as an adhesion primer then overcoat with a range of paint systems.

February 2014

Q. I have a quantity of Resene Summit Roof paint left over. Can I use this on 4mm marine plywood, without undercoating?

A. Resene Summit Roof is only self-priming to new galvanising and Zincalume; it can be used as a topcoat on primed timber.

February 2014

Q. How can I paint acrylic over plastic?

A. If you are using standard decorative acrylic paints then it depends upon the plastic type, acrylic paint (waterborne) will adhere to uPVC and acrylic sheeting such as Perspex. However poor adhesion occurs when these acrylics are applied to polyethylene and polypropylene plastic materials.

January 2014

Q. A question - can 'Bug Juice' be used as a spray around the house? We live in a rural area and summer brings cockroaches. If so please provide detail for application.

A. Bug Juice can only be added to a waterborne paint, and when added to paint the paint cannot be sprayed, so unfortunately it would be unsuitable for the spraying you wish to do.

November 2013

Q. I am wanting a high quality waterborne tint that contains no glycols.

A. The term glycols covers a large range of chemical entities. As a general class glycols are used in many colourant formulations to ensure that the colourant does not dry out and thus can be dispensed at point of sale. All Resene machine colourants are non VOC (contain no formulation component that has a boiling point less than 250 degrees celsium) and are ethylene and propylene glycol free.contains no glycols I want to paint our roof with Resene Rustic Red roof paint and I also want to paint the window trims in the same colour. When I test it on the window frames I get a colour that is much brighter than the colour chart. Can you help me understand what is happening?

A. The difference may be due to gloss level and possibly the size of the chip versus a larger area. Resene colour charts and testpots are low sheen finish. Resene Hi-Glo is a gloss finish. Higher sheen finishes will look cleaner and brighter. Lower sheen and flat finishes look duller and muddier.contains no glycols Can you provide guidance for painting over an oil based paint (internal windows) with a waterborne paint?

A. Assuming the existing paint system is sound, wash down with Resene Paint Prep and Housewash and wipe down with a cloth and cleam water. Allow to dry then sand the old enamel to a dull finish using 180 or 220 grit sandpaper, dust off and apply c followed by two coats of any Resene waterborne enamel topcoat.

November 2013

Q. Is the paint in your testpots, real paint, the same quality we would get in the large tin. I was worried it is a cheaper composition just to help select colour?

A. The paint in Resene Testpots is mainly Resene Lumbersider, so yes the same paint as you would get in the Resene Lumbersider paint cans. Some of the testpot paints are Resene Enamacryl Metallic (for the metallic paints), Resene Waterborne Woodsman (for the exterior wood stains) and Resene Colorwood (for the interior wood stains). They are all the same formulations as you would find in the larger pack sizes for those products.

November 2013

Q. How do I turn a mid-dark brown oil-based paint to black?

A. It is unlikely that you can change the colour to a true black. Black is achieved by addition of a black tinter to a base containing no other pigments and in your case this requirement cannot be achieved.

November 2013

Q. What is the difference with the solventborne enamel paint today compared to 10 years ago when I last used the product?

A. Advances in paint technology are usually made in small increments and some of these advances are not immediately obvious to an end user. There have been few if any changes to the resin technology used to produce solventborne enamels, Resene have recently introduced a number of lower odour enamel products. The lower odour formulations contain the same level of solvent but the solvents used for the lower odour formulations have a very low aromatic content. Aromatic hydrocarbon solvents carry a higher level of potential health risk to end users so the move to a lower odour version based on very low aromatic content solvents is a positive move.
There are a large range of resins used to formulate waterborne paints, resin selection is determined by the end properties required for the paint. Over the last 10 years there has been an increase in the availability of waterborne enamels to the market. These paints offer nearly all of the benefits of a traditional solventborne enamel but without the solvent levels of traditional enamels.

Resene has continued to focus on formulating environmentally sustainable paints with volatile organic compound (VOC) levels that meet the requirements of Environmental Choice Approval.

August 2013

Q. I would like to paint my solar water collector. It is thin aluminium plate. It requires a black paint that is high temperature tolerant and can absorb heat from the sun’s rays. What would you suggest?

A. The only product we have for this would be Resene Vinyl Etch Black.

August 2013

Q. I have used your Resene Madam M and I was wondering if I misjudged how the colour would appear on the walls. Three coats were needed to get desired effect. Is that normal?

A. Two coats of most Resene colours will achieve hiding; however with colours within the colour space of Resene Madam M an additional coat or an undercoat will be required.

August 2013

Q. I am looking for a method of hand painting a large aircraft and obtaining as near to a high gloss finish like a spray paint job would look. I can't use spray equipment due to the desire to have no overspray. The aircraft is in a museum and can't easily be moved or shrouded. I understand there are roller methods followed by a very light soft brush barely touching the paint. The brush is used to remove or burst the air bubbles. Do you know of such a method?

A. There are certain sleeve types that can give a rolled finish with very little orange peel but they’re only used for waterborne paints. You are correct: you can roll on a paint then lightly tip off with a brush to remove entrained air. What we seek to do is to select a roller sleeve for the paint type being used to avoid entrained air and tipping off then can attenuate some of the roller stipple to give a finish with minimal orange peel appearance.

June 2013

Q. Can I use an acrylic undercoat over a waterborne enamel?

A. Yes, if the waterborne enamel is more than one week old then sand prior to applying the acrylic undercoat.

May 2013

Q. I need to match colours on a house that was painted 7 years ago. How can I find the colour matches?

A. Scrape off a small portion of the colour (in an inconspicuous area) and bring it into the Resene ColorShop. They can then measure the colour using a Resene ColorHelper which will tell them what the closest Resene colours are. The matched colour will be for colour and not gloss level, you will then need to decide on the closest gloss level. Our Resene ColorShop staff can assist with this. Before you take the flake it is best to wash down the area you are using for colour matching as if there is chalking of the paint this may give a false colour.

May 2013

Q. Where do I find info on the best time to paint? Late summer? Autumn? Spring?

A. Paint application is dictated by environmental conditions and not necessarily the season. However the majority of exterior painting jobs are undertaken over summer months.

Waterborne paints are now the predominant type of paint used for both exterior and interior painting. The environmental conditions that are required for successful application of waterborne paints are temperature and relative humidity. As long as the paint is applied within the stated boundaries for either of these there is no seasonal restriction on painting. Standard waterborne paints cannot be applied at temperatures less than 10°C or when temperatures are liable to drop below this during the drying (film formation stage) of the applied paint. This temperature limitation is to ensure that the film forms and dries with the required film properties, waterborne paints will dry at temperatures below the 10 degree cut off but film formation and final film properties are compromised.

Resene now has a selection of waterborne paints that can be applied at temperatures down to 2°C and still dry to give the required dry film properties and these are marketed as ‘Wintergrade’ versions.

Relative humidity is the other environmental factor that limits when waterborne paints can be applied. For film formation to occur as designed water must be lost from the wet waterborne paint, and as the relative humidity increases the rate of water loss to the atmosphere is reduced. We do not recommend application of any waterborne paint at a relative humidity of greater than 85% as application and drying above this affects film formation and subsequent film properties.

There is a relationship between temperature and humidity that also needs to be considered, especially when painting metal roofing and that is dew point. Dew point is the atmospheric temperature below which water droplets begin to condense and dew can form. A safe rule of thumb is not to paint at or above 85% relative humidity especially during a period where the temperatures are expected to fall. Metal roofs are the classic situation where painting late in the day with waterborne paints can lead to the paint being washed from the surface due to dew formation on the roof. This occurs because the paint film cannot form in the required manner in time to reach a state of cure that develops water resistance. The dew point considerations can be presumed to be satisfied if a thin clearly defined film of water applied to the surface with a damp cloth evaporates within 15 minutes.

There is no seasonal restriction to paint application as long as the environmental conditions meet the requirements for the paint being used.

May 2013

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