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Answers to your questions from our Tech Experts


Here’s a taste of some of the Technical Expert questions and answers to help you 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 Technical Expert for help or come in and see our staff at your local Resene ColorShop or Reseller.

 
 
 

 

Page 20


Q. We just bought an old Lockwood home and we want to paint the interior. We read up a little bit about your advice on prepping the wooden surface. What is the difference between your product Resene Paint Prep and Housewash and Resene Paintwork Interior Cleaner?

A. Resene Interior Paintwork Cleaner is a non-dulling neutral cleaner designed for use on all interior painted surfaces. It dries film free, eliminating the need for rinsing. Resene Paint Prep and Housewash is generally what we recommend to clean exterior painted surfaces. It is good at removing windblown salts and other contaminants. It’s also good at removing chalkiness from exterior paints which promotes good adhesion when repainting. This product needs to be rinsed off with clean water.

For painting interior Lockwood walls we recommend the following: Use Resene Interior Paintwork Cleaner and ensure the surfaces to be painted are clean and free from grease; pay particular attention to hand contact areas. Apply a thin coat of Resene Waterborne Smooth Surface Sealer and allow curing 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.

October 2016

Q. I have a new Kwila deck which is 20 square metres and is 15 weeks old. Do I need oil or stain?

A. If practical allow to weather for 4-5 weeks. Wash using Resene Timber and Deck Wash. This is to open the timber fibres. Rinse thoroughly and allow to dry. Kwila contains a water soluble tannin which rapidly leaches out when wet (rain or hosed). The tannin will stain concrete and tiles. You then have choices of topcoat, all are suitable. For a natural, oiled finish apply two coats of Resene Furniture and Decking Oil. To enhance and retain the natural colour of Kwila use Resene Kwila Timber Stain; allow for a second application after 3-4 months. To colour and protect apply two coats of Resene Woodsman Decking Stain.

October 2016

Q. I am getting organised (early days) to repaint the exterior of my house. I have a combination of timber, brick and COLORBOND® panels in some areas. I have been looking through your product range and can't really see a specific paint product to paint over existing COLORBOND® panels and gutters.

A. The COLORBOND® panels and gutters require a good scrub/wash with Resene Paint Prep and Housewash. Rinse thoroughly with clean water. Apply two coats of Resene Summit Roof Paint.

October 2016

Q. I have a 70 square metre new garage with concrete floor that I’m looking to paint. Can you please suggest the right product?

A. Leave new concrete to cure for a minimum of 28 days before painting. Diamond grind to achieve a slightly roughened surface (it should resemble 180 grit sandpaper). Apply a saturation coat of Resene ArmourBond then apply three coats of Resene Aquapoxy for Flooring.

October 2016

Q. I am painting a pine gate. I have acrylic primer and the colour topcoat is enamel. Is that ok to do?

A. If your primer is Resene Quick Dry and your topcoat enamel is Resene Super Gloss, Resene Enamacryl or Resene Lustacryl the answer is yes.

October 2016

Q. We have had plywood walls for about 3 years. Earlier this year we put two coats of Teak Oil on them. Now we have a kitchen in place, the walls are very dark and were wondering what/how we could paint them to lighten the room up. Ideally I'd like to whitewash - is this possible?

A. Clean the walls with Resene Interior Paintwork Cleaner ensure the surfaces are clean and free from grease. Pay particular attention to hand contact areas. Apply a coat of Resene Colorwood Whitewash (apply another coat if you would like it to look whiter) then apply two coats of Resene Aquaclear in your desired finish. Resene Aquaclear is available in satin, semi-gloss and gloss. Sand the walls with 240-400 grit sandpaper before you apply the final coat of Resene Aquaclear.

Please trial the Resene Colorwood Whitewash in an inconspicuous area before you proceed (it is available in a testpot). It is normally applied over bare timber or previously polyurethane coated timber rather than previously oiled timber.

October 2016

Q. In your most recent Habitat book it talks about reviving concrete pavers with Resene Paint Prep and Housewash and then sealing with Resene Concrete Conserver – what is this?

A. Resene Concrete Conserver is a non-tinted version of Resene Concrete Stain.

October 2016

Q. How does LRV correlate to TSR value? I've been told that an LRV of 40 or more is ‘safe’ for weatherboards and the CoolColour™s brochure shows that technology can raise the TSR by about 20 units. I'm not clear as to how CoolColour™ tech raises the LRV however. Given that LRV is what is published, I'm not sure how to judge which colours might become ‘safe’ as a CoolColour™.

A. There is no direct correlation between LRV and TSR. With regards to Resene CoolColour™ Technology the LRV does not change for the non-colour and CoolColour™ versions of the same colour as LRV is a measure of light reflectance within the visible region. TSR (total solar reflection) is a measure of reflection of near infra-red radiation that is heat. The TSR of a cool version of a colour will always be higher than the non-cool version of the same colour however there is no standard percentage increase as the CoolColour™ TSR is determined by the amount of black in a colour formulation. The largest increase in TSR is found for Resene Black which only has black as the pigmentation. All our TSR measurements are made by application of two coats of topcoat over a white base coat.

We have derived a way to relate LRV and TSR, an LRV cut off of 40% is equivalent to a TSR of >36%.

October 2016

Q. I have an Oamaru stone statue which is in the garden. It is porous and has previously been painted with an acrylic paint which is now badly flaking off. What type of paint should be used which will be durable?

A. We don’t recommend painting Oamaru stone with a film forming paint as the stone surface cannot be stabilised to accept paint. We only recommend application of a saturation coat of Resene Solventborne Aquapel to the bare stone.

October 2016

Q. We are carpeting a downstairs bedroom that has a concrete floor. I found white powdery growth like salt crystals underneath one corner. We have drains all around the house but I guess the constant rain has made the concrete just damp enough for this growth. There is no obvious dampness except for the crystals. What waterproofing do you suggest we use on the concrete to stop this happening?

A. The white crystals are a result of efflorescence, water coming up through the concrete bringing dissolved concrete salts to the surface. This is more than likely due to the absence of a waterproofing layer being installed before the concrete was poured or a rupture of the membrane due to earth movement.

The only product we have is Resene Aquapoxy (three coats) but we cannot guarantee that this will solve the issue. The salts will need to be removed by diamond grinding prior to application of Resene Aquapoxy.

October 2016

Q. I have applied Resene Lustacryl to an old solventborne enamel system on skirting boards. The skirting boards were sanded and then two coats of Resene Lustacryl applied and allowed to cure for a month. The customer has had a carpet layer come into quote for carpet laying and the carpet layer has tested the adhesion of the new paint and can scratch the paint off, back to the original paint system. What is wrong?

A. Modern carpets have a synthetic plastic backing which during laying will result in scratching to any paint system, irrespective of type and age.

When changing from a solvent to waterborne enamel, sand to a dull finish but always apply a coat of Resene Quick Dry before applying the waterborne enamel topcoats.

The alternative is to lightly sand, then apply a thin coat of Resene Waterborne Smooth Surface Sealer, leave for a couple of days then apply the waterborne enamel topcoats.

October 2016

Q. I am stripping internal doors and repainting by brush, the doors are hollow ply with a smooth surface. I am getting brush drag marks on the final coat. The water based paint seems to be drying very quickly even though the temp is around 16-20 degrees. The drag marks are appearing when I overlap the paint.

A. Waterborne enamels do set up quickly and this can result in brush marking as the wet film open time is short and flow and levelling often does not occur to the extent as seen with traditional solvent borne enamels. The only way to reduce this is to add Resene Hot Weather Additive.

October 2016

Q. I am painting my doors. The first coat is Resene Waterborne Smooth Surface Sealer, followed by Resene Quick Dry undercoat, then two coats of acrylic enamel. My question is - do I need to lightly sand after every coat?

A. No unless there is surface contamination. Definitely not needed after the Resene Waterborne Smooth Surface Sealer has been applied.

October 2016

Q. I have purchased a house which has dark bronzed anodized aluminium windows and which have areas of oxidation/rust on the exterior facings. I plan to hand paint the aluminium frames and would like a specification to treat the oxidation, to etch prime, to undercoat and to finish the coat to a smooth finish.

A. Scrub down with Resene Roof and Metal Wash diluted and used to label directions. Wet sand areas of corrosion back to a sound base, clean back and when dry apply a coat of Resene Armourcote 221 to areas of prepared corrosion. Apply a full coat of Resene Armourcote 221 and then finish with two coats of Resene Uracryl 403.

October 2016

Q. I have just had an Eco ply, grooved plywood ceiling installed in my living room. What would be the best way to seal this? I am not keen on a varnish, I would prefer an oiled finish to nourish the timber and to be able to see the grain. A painter suggested using decking oil, but I was not sure if that would dry in an interior.

A. We would start with a clear solvent or waterborne varnish system or Resene Danska Teak Oil. Once timber is harvested it cannot be nourished; this is one of many myths within the coating industry.

October 2016

Q. I want to white wash a new pine exterior deck but am unsure what product to use. There seems to be more than one option. Can you please tell me what you would recommend?

A. The only exterior product we have is Resene Woodsman Whitewash (apply two coats). The durability of this will depend upon the level/type of foot traffic and exposure level to the elements.

October 2016

Q. I've got a house that has weather-side exterior cladding (in good condition), I would like to maintain and preserve the condition by repainting it. Could you please advise what the best way to deal with this type of cladding?

A. The best system would be to clean down using Resene Paint Prep and Housewash, diluted and used to label directions, then apply a full coat of Resene Quick Dry waterborne primer undercoat and finish with two coats of Resene Sonyx 101.

October 2016

Q. We've stripped the wallpaper on our 1937 home and discovered age related cracks in the plasterboard. Some plasterers have suggested putting pigmented seal on the walls before applying fibre fusion, others say it's optional. What are your thoughts?

A. We would recommend a coat of Resene Sureseal is applied.

October 2016

Q. I am sealing a concrete floor in a new home. Datasheet D508 recommends diamond grinding the floor which is not the look I am after. I have a very well floated slab which I want to seal to lock in the natural concrete look and protect from stains. So bearing in mind the house has plasterboard and is painted, what preparation is required before applying Resene Concrete Wax?

A. If you splash water on the floor does the water absorb and darken the concrete? If yes then ensure the surface is sound and dust/laitance free. To achieve a water seal you will more than likely need additional coats to what is given on the product data sheet.

October 2016

Q. Can I paint a particle board wooden floor? What paint would you recommend? It’s residential and a pigmented finish is required - its new particle board but I am worried about scratching.

A. There is no paint system that will not scratch. Our best system to achieve what you want is to apply a prime coat of Resene Quick Dry waterborne primer undercoat leave to dry for 48 hours then apply two coats of Resene Waterborne Uracryl 802.

October 2016

Q. I have a house made of concrete block and some Brickalyte (thin bricks stuck on to fibre board). Both are in good condition and never been painted (1978). I was intending to use Resene Sonyx 101, but an older painter suggested using a waterproof membrane paint. Your thoughts?

A. If the existing cladding is weathertight, that is no water ingress issues, then application of a weathertight paint system is not required. We cannot assess/establish the weathertightness of a cladding system.

Application of a weathertight paint system would be a belts and braces approach and would give an extra level of performance over a standard paint system.

If you are happy with this approach then the paint system will be blockwork then a primer coat of Resene Sureseal and three coats of Resene X-200, on brick veneer use a primer coat of Resene Concrete Primer and three coats of Resene X-200. If there is no weathertight issues then replace the Resene X-200 topcoats for both substrates with two coats of Resene Sonyx 101.

All block pointing (mortar between the blocks) must be sound and any flashing details functional.

October 2016

Q. I primed a COLORSTEEL® roller door with Resene Galvo One around six months ago but I ran out of time to do the topcoats. The data sheet only mentions 'May be overcoated... anytime over a period of three months'.

Given the time that's passed since the Resene Galvo One went on, is there anything special I need to do before applying the Resene Hi-Glo topcoats? I'm thinking it's going to need a good clean (metal wash)? I have some left. Perhaps a very light sand with 200 grit paper?

Will it need redoing with Resene Galvo-One?

A. Lightly sand using 220 grit sandpaper to provide a mechanical key for the new paint. Scrub down using Resene Paint Prep and Housewash diluted and used to label directions. You will have to re-prime before topcoating.

October 2016

Q. I am just wondering if I paint on ply wood, what paint should I use and what do I use to waterproof it? It is for a school and will be pop riveted onto metal. It will be about 1m x 60cm. I'm not sure what wood to use.

A. Apply a primer coat of Resene Quick Dry to all sides of the ply then apply Resene Lumbersider for the top coat finish (two coats, only needed for the visible face). Note that painted ply exposed to weathering will develop surface checking.

October 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. We want to repaint our house. The painter recommended Resene Sonyx 101. At the Resene shop I heard that most people use Resene Lumbersider low sheen. My question is: is Resene Sonyx 101 easier to clean as the painter seems to think or not? We tend to be low sheen people but would be happy to go with Resene Sonyx 101 if there is any advantage from a cleaning or durability point of view.

A. Both the durability to weathering and clean ability increase as the gloss level increases. I always use/recommend using Resene Sonyx 101 for exterior painting of exterior claddings.

October 2016

Q. What is the best product to paint Shadowclad® ply that has a powder coat primer on it?

A. Any Resene topcoat can be applied over this primer provided it has been left exposed to prolonged weather.

October 2016

Q. We have weatherboards that had a factory primer that have been prepped and overcoated with primer and paint. The paint is cracking and split whether the weatherboard joins are. It’s worst on the most exposed/sunny areas. Where existing weatherboards have been painted over, the paint looks fine.

A. The problem here is the shrinkage/movement of the new boards as they have adjusted to various levels of moisture content.

The holding primer will do little to control the moisture ingress and then when fully painted up the boards would be exposed to various levels of heat and humidity and would move accordingly.

Obviously in areas of strong sun the highest movement would be expected.

The old boards being already painted would not be subjected to this level of movement as they would have been better sealed from previous coats of paint.

The gaps produced where the new boards are fitted are quite significant and could not be bridged by coats of paint.

October 2016

Q. We are creating a new bach and want to use Resene Concrete Wax on the interior concrete floor. How soon can it be done after the floor is poured?

A. Resene Concrete Wax is not a penetrating product. The surface should be full dried and cured before coating. Typically diamond grinding preparation after full 28 day curing would be recommended.

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. I have a galvanised metal roof on the carport. It’s never been painted. Recently some surface rust appeared in places so I covered it with rust converter. I intend to paint it with a couple of coats of Resene Hi-Glo. Do I need to prime it first and, if so, what would you recommend?

A. We have limited confidence in rust convertors giving long term corrosion control despite the product description. Wash down using Resene Roof and Metal Wash diluted and used to label directions, Spot prime red rusted areas with Resene GP Metal Primer then apply a full coat of Resene Galvo One and then finish with the two coats of Resene Summit Roof paint.

October 2016

Q. What type of paint should be painted onto new cedar window sashes and sash putty?

A. Use Resene Wood Primer for the bare cedar sashes and after the putty has skinned off use Resene Enamel Undercoat for priming of putties.

October 2016

Q. What is the best sealer to cover fly stains after they have been washed?

A. We recommend using Resene Sureseal. Then use Resene StainLock if you still see any bleed.

October 2016

Q. What sealer will hold back the fly aerosol that has leached onto the wall as most won’t dry when applied?

Clean down with Resene Emulsifiable Solvent Cleaner then we recommend using Resene Sureseal. Then use Resene StainLock if you still see any bleed.

October 2016

Q. What do you recommend on LINEA® board and why?

A. Resene Concrete Primer followed by two coats of Resene Sonyx 101. The Resene Sonyx 101 has a higher gloss (semi-gloss vs low sheen) and will be easier to wash.

October 2016

Q. I want to use clear Resene Uracryl to paint wooden bench tops inside. Do you have a clear sealer to use underneath or does it have a direct to surface capability? I don’t want to use gloss.

A. Use Resene Uracryl 403 as the sealer coat, followed by the gloss level of your choice.

October 2016

Q. For industrial coatings which primers are used with which topcoats on which substrate and what are the no goes? Is there a simple rule of thumb?

A. The general rule of thumb is 1k primers with 1k topcoats and similarly 2k primers with 2k topcoats.

October 2016

Q. Is there any reason why you don’t have a turps based semi-gloss for exterior?

A. Oil based enamels lose their gloss quickly and embrittle over time. In a semi-gloss finish this occurs even quicker than gloss finishes and is not suited to our local climate.

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. We painted some walls in low sheen acrylic and hung some artwork two or three days later. A couple of years later when the artwork was removed, we noticed that the pictures had left marks like shadows on the walls. I do understand that the sun can play a part to this, but in most of the areas the sun did not hit the walls where some of the pictures were. My question is can the paint be affected by what sort of pictures and materials that are hung on the walls, even if the sun is not on the walls to cause the shadows?

A. Paint may dry in 2-4 hours but can take several weeks to cure. It is important to let the curing process complete this cycle before blocking the airflow with pictures etc. Blocking the airflow can lead to improper cure leading to film irregularities including colour differences.

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. Why do we have to use vinyl wallpaper sealer over Anaglypta type papers and not an acrylic sealer?

A. Standard acrylic latex paints contain coalescing solvents that assist the plasticiser to migrate from the wallpaper into the paint film. This results in the sticky surface. A faster drying solvent modified system avoids this problem.

October 2016

Q. How can you keep the rustic look on metals i.e. doors or sheets of metal without it rusting further but providing a clear coating to protect against the elements?

A. Our best recommendation is applying Resene Waterborne Aquapel which should give good water beading for up to a year. Repeat as necessary. A sealer of any kind tends to change the look of the surface though so always best to try a sample area first in an inconspicuous area to make sure the finish is ok before proceeding.

October 2016

Q. What is the best system to recommend for a clear coat to protect exterior brick/plaster/concrete but keep the natural look?

A. Use Resene Solventborne Aquapel followed by Resene Concrete Clear.

October 2016

Q. Which product adheres better to stone aggregate? Resene Concrete Wax, Resene Uracryl 400 series or Resene Concrete Clear?

A. Resene Concrete Wax and Resene Concrete Clear.

October 2016

Q. I need an interior floor paint for a small laundry in our home. What do you recommend?

A. Resene Walk-on and then overcoat in Resene Concrete Wax.

October 2016

Q. Where is the best place to use Resene Concrete Wax?

A. Polished interior concrete floors and benches.

October 2016

Q. In a factory type setting would Resene Uracryl 800 series be a better system than Resene Aquapoxy on an interior concrete floor, especially in the colder months?

A. Resene Waterborne Uracryl 800 series has better scratch and mar resistance than Resene Aquapoxy.

October 2016

Q. I have a stained deck and want to overcoat it with non-skid, what is the correct procedure?

A. Scrub down with Resene Timber and Deck Wash, then apply Resene Wood Primer and Resene Walk-on or Resene Non-Skid Deck & Path.

October 2016

Q. Which can you use for decks - Resene Woodsman or Resene Woodsman Decking Stain?

A. Resene Woodsman Decking Stain is a dedicated foot traffic area product so information is more focused on that. Resene Woodsman is more focused on vertical areas but can be used on horizontal also.

Both products are fine for use on decks. Solventborne tends to penetrate better.

October 2016

Q. Some colours have ‘uc’ – I know that means an undercoat is recommended for the optimum finish, but does this mean Resene Acrylic Undercoat/Enamel Undercoat, Resene Quick Dry or is a 3 coat option acceptable enough?

A. ‘uc’ is referring to using a varishade undercoat (so acrylic or enamel undercoat tinted to the right varishade).

October 2016

Q. I have cedar weatherboards and am looking for as natural as possible a finish.

A. We don't recommend clear finishes for exterior timber as it does not provide enough protection to the timber. Many customers use the Woodsman ‘Natural’ finish. Another option is to choose the Resene wood stain colour closest to the timber colour you have so that once applied it enhances the existing colour of the timber. E.g. We have a colour Cedar which might suit better if you want the more redder look of cedar. As timber varies so greatly in the way it accepts the stain, the best way to judge whether you like it is with a testpot.

October 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. I am going to paint the walls in the living room. They have textured wallpaper and were painted over. The paint is in pretty good condition so I would like to just paint over it rather than trying to strip the wallpaper, it appears that the paint on the wallpaper is oil paint enamel. It would be difficult to sand them because of the texture. What is the best way to paint over it? Should I paint a coat of oil base enamel before two acrylic topcoats? Or can I just put two acrylic topcoats?

A. Can you please check that the wall paint is not softened or dissolves upon rubbing with a cloth wet with methylated spirits? If there is no softening of pigment transfer to the cloth then this will confirm that it is solventborne enamel. If this is the case than the only option is to apply a thin coat of Resene Waterborne Smooth Surface Sealer and leave the sealer to cure for 48 hours then overcoat with Resene Zylone Sheen or Resene SpaceCote Low Sheen.

November 2016

Q. We are in the process of replacing a deck on the second floor using kwila. Is there a sealer that you might have to stop the kwila from bleeding onto the concrete driveway below? Could you also recommend any other product you might have to stop this from happening or what we could do prior to installing to help us with this problem?

A. If you scrub the decking timber down using Resene Timber and Deck Wash pre installation then this will wash most of the water soluble tannins from the timber. To address this post installation is difficult.

November 2016

Q. Can Resene Blacktop be used on a concrete path?

A. Yes, concrete should be porous and if unpainted apply a seal coat of Resene Sureseal first.

November 2016

Q. I’m currently painting our poly plastered house with Resene X-200 membrane paint. Can I use this paint on plastic downpipes as well?

A. Yes, as long as the PVC is clean and there are no sealants/adhesives exposed.

November 2016

Q. I have an enclosed building with a Clearlight roof, what type of paint should I use to paint the roof on the inside? The room gets really hot in summer but I still need light to come in.

A. Any Resene interior waterborne wall paint should work.

November 2016

Q. I am undertaking a large mural approximately 14 metres long and 4.5 metres high on a tilt up precast concrete wall. The wall has been acid cleaned in the factory and in situ for 12 months. I have used Resene Concrete Primer but I notice in your case studies most use Resene LimeLock. I am painting a blackboard effect in parts as well as colour and metallic paints. Will this primer be enough? This is for a hospital and I have to make it last!

A. Resene LimeLock is recommended where there is the possibility of lime leaching. In this case I would recommend an application of a second full coat of Resene Concrete Primer to ensure there is sufficient blocking of the underlying concrete.

November 2016

Q. I have painted my ceiling with Resene Ceiling Paint flat. Can you wash this e.g. after my husband has squashed 20 mosquitoes on it?

A. Flat ceiling paints such as the Resene product you have on your ceiling are not easily cleaned without burnishing the painted on rubbed areas (rubbing causes the paint to increase in gloss level). The only Resene flat paint that can be cleaned without burnishing is Resene SpaceCote Flat.

November 2016

Q. How do I paint plastic chairs?

A. If the chairs are made from PVC then they can be painted. The easiest way to check is to apply some Resene testpot paint to a small area on the chair and wait 48 hours and see if the paint can be scratched off using a fingernail. If not, then you can paint the chairs with any Resene exterior waterborne paint. Tower plastic type chairs such as polyethylene (black piping) or poly propylene (the same plastic used to mould paint pails) cannot be painted. I believe that most of the plastic chairs are moulded using a polypropylene precursor.

November 2016

Q. We have a house extension just completed and I am about to paint the weatherboards. They are pre primed pine. The external corner soakers are stainless steel. I have yet to decide if I will leave the soakers as a steel finish or paint them. The rest of the house has old galvanised soakers that are painted. If I was to paint the new stainless steel soakers, what Resene product would be suitable as a primer on these?

A. Clean down with Resene Roof and Metal Wash diluted and used to label directions then apply a coat of Resene Galvo One.

November 2016

Q. What is the best product to use when prepping the exterior of a house to restain?

A. We recommend Resene Paint Prep and Housewash.

November 2016

Q. When painting outdoor fences with white water based Resene paint, the nails in the fence after a time get rusted and the rust colour flows down onto the white paint on the fence. Is there a solution to stop this from happening?

A. You can spot prime the nail heads with two coats of Resene GP Metal Primer. However most of the rust staining can come from behind the nail head.

November 2016

Q. I have built a pool fence using Cypress Pine post and rail. Should this be oiled or painted? Which would be the best low maintenance product to use?

A. A solid paint finish will definitely give the longest maintenance interval.

November 2016

Q. How long after we apply Resene Sureseal can we paint over it? I notice you can recoat it after approx three hours but wasn’t sure if we needed to leave it longer for painting

A. Overcoat times are dependent upon environmental conditions, temperature and air flow. The data sheet states coat at three hours when the temperature is 20 degrees, would suggest to be safe leave for an additional three hours if the temperature is cooler but also ensure the area is well ventilated.

November 2016

Q. I have a large ceiling to paint with thirteen downlights above the kitchen cupboards and a drop down in the ceiling. Is there something I can do to slow down the drying process so I can get to the edges before they start to dry. There is a heat pump in the room so I can set the temperature to help slow down the process. I will be using waterborne semi-gloss and applying it by roller.

A. Assuming you are using waterborne paint, if so then add the maximum allowable quantity of Resene Hot Weather Additive.

November 2016

Q. How easy is it to paint over whiteboard paint? I have a tenant who wants to use it but I'm concerned about redecorating when they move out.

A. The Resene Write-On Wall Paint will need to be thoroughly sanded for repainting.

November 2016

Q. I need some tech info/advice re the darkest stain or 'CoolColour' we could apply to exterior pine weatherboards.

A. There is no colour limitation for staining timber weatherboards. Most weatherboard suppliers limit colours to those with an LRV of greater than 45%. There is no difference in the LRV of a non-cool and CoolColour™ of the same tinted colour. What changes is the TSR (total solar reflectance) which is the amount of heat reflected and the TSR of CoolColours are always higher than the value for non-cool versions of a given colour.

November 2016

Q. I'm painting a timber mantelpiece on top of an unused fireplace. Would I just wash, light sand, prime, light sand and then use the Resene Lustacryl semi-gloss paint? Or do I really need to get all the existing varnish off before painting?

A. Yes, use Resene Quick Dry waterborne primer undercoat as the primer after a thorough sanding. Alternatively degrease then apply a coat of Resene Waterborne Smooth Surface Sealer, then leave to cure for 48 hours then apply two coats of Resene Lustacryl. The paint system will take seven days to gain good adhesion.

November 2016

Q. A few months ago I started on a floor in a shed of my client, waterblasted it and applied Resene ArmourBond to seal it before using Resene Aquapoxy to topcoat it. The sealer took forever to dry though, it was just around the 10 degree mark during the day. Because of the cold temperatures I decided not to proceed with the Resene Aquapoxy because they forecasted frost. Now I realise that the Resene ArmourBond says to not wait any longer than five days to do the overcoat. But there are still two more coats needed to seal the deal; can you please tell me what the solution to the problem would be?

A. Clean down using Resene Paint Prep and Housewash then thoroughly sand to provide a mechanical key for the subsequent paint coats. Dust off and continue with overcoating.

November 2016

Q. I have a house which is covered in a fake brick veneer cladding, which is fixed over weatherboards. I would like to paint over the bricks. I have talked to someone at a Resene ColorShops and they said to try Resene Sureseal before painting. I have tested a small patch with Resene Sureseal and it broke down the brick to the point it went soft and bits started falling off. Is there any other sealer that I could use so I can paint over this ugly brown clinker brick? I have painted a small section with Resene Lumbersider only with no problems.

A. There will always be a potential issue when painting over this type pf cladding, especially if it is well aged/weathered. Resene Sureseal is our standard recommendation this situation but given your observations the only alternative would be a coat of Resene Concrete Primer then two coats of a Resene waterborne exterior paint finish. If possible avoid selecting a dark finish colour.

November 2016

Q. Five years ago we had a new house built which included decks with a Rhino Tuff Stuff decking membrane with paint over finish. This was installed by my builder who was a licenced applicator and who also arranged for the decks to be painted. Unfortunately the paint is lifting in particular where rainwater has been ponding. The builder is no longer around and I am unsure what paint product was used by the painter at the time. I need to repaint the deck which I will do myself.

I have done some research and need to know what I can use to first clean the deck and then see if your Resene Membrane Roofing Primer will be suitable to spot prime the damaged area. I then need to apply a sealer or a topcoat which I presume will need to go over the whole decking area. What Resene product should I use for this please?

A. There are two versions of the Rhino product available, one is a rigid, the other elastomeric. Resene Uracryl 403 was tested and approved by the then licensee for the rigid version only.

November 2016

Q. We have purchased a holiday home with an external balcony. The balcony has butyl flooring with what looks like grey paint on it. The paint is old, but sound, apart from hairline crazing. Would your Resene Membrane Roofing primer be OK on that? Ideally we want a non-slip finish.

A. We would not recommend painting over any paint that shows any hairline crazing.

November 2016

Q. My partner has just extracted a large slab of red schist from a local river and installed it as a hearth under the wood stove in the living room. We intend to keep the surface natural and don't want a gloss effect, but would like to find some product/treatment to use to bounce the colour out a little. I wonder if you sell any products that might be suitable.

A. There is no clear coating that will retain the flat look to the stone. I suggest you look to use Resene Concrete Wax, this will highlight the stone colour in a low gloss finish. A wet stone is what produces the stone colour.

November 2016

Q. I have polyurethane tongue and groove pine in the hallway. It has gone dark over the years. I would like to give it a whitewash effect. Do you have a product for this please?

A. Clean down using Resene Interior Paintwork Cleaner to label directions. Sand the polyurethane clear then apply an even coat (speed brush application) of Resene Colorwood Whitewash. Then apply a second coat of Resene Aquaclear with added Resene Colorwood Enhance White.

November 2016

Q. I want to paint my cot and I would like to know if interior/exterior wall and trim water based semi-gloss is okay to use on it?

A. Resene Lustacryl is Environment Choice approved. I would suggest that after painting you allow the paint to cure for at least two weeks then wipe down a couple of times using a cloth and warm water and allow to dry.

November 2016

Q. How do you refurbish an oxidised and pitted brown aluminium soffit?

A. Prepare by washing down with Resene Roof and Metal Wash, wash, then wet sand with 220 grit wet and dry paper or ScotchBrite® with the red pad. The latter is designed to remove surface oxidation product but will not produce a smooth profile. Then apply a coat of Resene Armourcote 221 and two coats of Resene Uracryl 403.

November 2016

Q. I want to paint some children’s wooden blocks - can you recommend if you have any non-toxic child safe paints I could use? A clear glaze specifically would be ideal.

A. The only paints we could supply are Environment Choice paints. For colours you can use Resene testpot colours (Resene Lumbersider) and for the clear glaze use Resene Aquaclear.

Apply the base colour and then leave to cure for a week and wipe down with a cloth and warm water, when dry then apply the glaze coat and repeat the cure and wash for the clear coat.

November 2016

Q. We have a weathered coloured concrete driveway that needs a makeover. Apart from a good waterblast what other prep do you suggest? - I do note when waterblasted the existing dye colour still washes out. What is the best Resene solid colour finishing product?

A. The continued leaching of colour is unusual as coloured concrete usually has a solid non water soluble pigment added to give the colour. Treat any areas of moss/algae/mould with Resene Moss & Mould Killer diluted and used to llabel directions. Then waterblast and when dry apply a saturation coat of Resene Sureseal then finish with two coats of Resene Non-Skid Deck & Path.

November 2016

Q. What product would you recommend as a two pot epoxy paint in black to cover a galvanised steel beam in a sea spray zone?

A. Resene Armourcote 510 but this will undergo chalking upon exposure to UV so best to overcoat with a can of Resene Uracryl 400 Series topcoat tinted to Black.

November 2016

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 Technical Expert for help or come in and see our staff at your local Resene ColorShop or Reseller.

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