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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.

 
 
 

 

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Q. I have a 28 year old COLORSTEEL® roof with puzzling blistering on the third from right flat part of profile. This is only on a few sheets all the rest are ok. However advice on how to treat this, also rest of roof and which of your products to use would be appreciated to paint whole roof. The roof is original COLORSTEEL® Karaka, never been painted or chemically cleaned and we are many miles from the ocean. There is no overhanging vegetation, and the area affected us well away from our chimney.  The entire sheet is affected.

A. It is unusual to see only a few sheets affected on a particular location. Given the age of the roof the original coating system has performed well. Is there any fallout form a chimney that may explain the blistering or over hanging vegetation?

The zinc present on galvanised or Zincalume roofing is sacrificial, the zinc oxidises and this electro-chemical reaction protects the underlying in steel from corrosion. White rust is the by-product of the zinc reacting with the atmosphere eventually the zinc is totally consumed and then the steel begins to rust and red rusting is seen. The rate of reaction is determined by the atmospheric conditions and salt that falls onto the roofing.

While the white material you see on the one roof section may well be white corrosion it is not usually confined to such a well-defined section of the roofing.

Suggest that you look to undertake a total strip of the affected section to see if there is under film corrosion present. If this is the case then you can apply a paint system to extend the life of the base material.

White rust forms when zinc is in an environment with hydrogen and oxygen. Most frequently, it occurs when a freshly galvanised material is placed into contact with water. White rust is especially likely to form on newly galvanised material. This is because the new zinc coating has not yet had the chance to form the stable oxides, and the hydrogen and the oxygen bond with the pure zinc which forms zinc hydroxide. White rust can be common on galvanised sheet that is being stored, as condensation can become trapped between the individual sheets, leading to the formation of white rust.

Scrub down using Resene Paint Prep and Housewash diluted and used to label directions. Rinse clean or hose down with fresh water ensuring all salts are also 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 waterblasting taking care not to damage either the substrate or the surrounding areas.

For the stripped section, after stripping 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,  taking care not to damage either the substrate or the surrounding areas.

Where under-film corrosion is taking place the existing paint must first be removed as above and remove under film corrosion products taking care not to damage sound zinc coated areas. All paint edges must be feathered to a smooth finish.

Note:  The performance of the subsequent paint systems will be largely dependent on the thoroughness of this surface preparation stage.

Ensure all edges of damaged paint are sound and immediately spot prime all areas of corrosion and any other bare metal with a full coat of the specified primer.

Prime bare substrates with two coats of Resene GP Metal Primer then apply two coats of Resene Summit Roof.

September 2019

Q. I want to repaint my 6yr old townhouse which has Linea® boards painted in Ironsand.  The north facing side has faded quite a lot and has a matt finish to it.  I am unsure of what has been used previously.  I would like to paint as much of it as I can myself and have seen that you recommend Resene Sonyx 101 for Linea® board but when I went to the Resene ColorShop I was not sure of whether to get that or the Resene Lumbersider paint (which I used on the fence).  Are you able to advise and is the Resene Sonyx 101 easy to paint with (similar to the Resene Lumbersider paint)?  I do also have a few joins in the Linea® boards that show at the moment as well.

A. Resene Sonyx 101 is a semi-gloss finish whereas Resene Lumbersider is a low sheen finish, both waterborne exterior paints. Both products are easy to apply.

While Resene Sonyx 101 will give a longer time to the onset of chalking the higher gloss level does highlight surface imperfections more than a lower sheen finish and for this reason many choose to use Resene Lumbersider.

The existing dark colour will cause filled joints to expand and contract with changes in sun intensity. While application of the Resene CoolColour™ version of a dark colour will increase heat reflection the CoolColour does not result in a surface cool to touch so joint expansion will still occur.

September 2019

Q. I am looking to revive the outside of a stucco clad house. After making some repairs I'm looking for a very thick paint which will hide any minor flaws as well as be good future protection. Do you have such paint?

A. We recommend Resene X-200.

September 2019

Q. What paint do I need to use to paint my concrete garage floor and what do I need to do to prepare it to obtain a lasting paint job?

A. Degrease using Resene Heavy Duty Paint Cleaner and Oil Remover diluted and used to label instructions. Diamond grind to achieve a uniform surface profile similar to 180 grit sandpaper. Ensure all grinding dust is removed, this may require wet mopping.

Apply a seal coat of Resene ArmourBond and finish with the Resene Aquapoxy for Flooring system.

September 2019

Q. I am looking for a child-safe stain for wooden blocks in brilliant colours.

A. We recommend Resene Colorwood.

September 2019

Q. I wish to waterproof the exterior cladding on my garden shed, which is clad with cement board. I'm after a clear finish; otherwise I would just paint it. I'm looking at your Resene Aquapel. Does this fit the bill?

A. Resene Aquapel is a water repellent treatment only, will not render the surface watertight. It would be better to paint with a solid paint system such as Resene X-200.

September 2019

Q. I want to paint my weatherboard house and I want to prep it correctly. It currently has primer and two acrylic topcoats, which are flaking off to bare wood (done 25 years ago!). I plan to scrape the paint off, but understand it is best not to electric sand acrylic off as the acrylic heats and balls. How do I remove the paint once the scraper has done its job (I wish to avoid mapping)?

A. It may be time to consider a total strip; areas that appear sound may also flake when more paint is applied.

Wet sanding is used to avoid balling up of waterborne paint. To address mapping you can use Resene Timber Surface Prep.

September 2019

Q. We have removed wallpaper that was directly glued to the GIB®. It has been removed quite well but we need to do some repairs with GIB® Tradeset compound. Do we use the compound first, directly onto the GIB® and then seal with Resene Broadwall Surface Prep and Seal or after and then spot seal again with the Resene Broadwall?

A. You can do the plastering direct to bare GIB®, and then apply the Resene Broadwall Surface Prep & Seal.

September 2019

Q. We have rebuilt a house from the studs up. We want to paint all the ceilings, windows and doors white, and the walls and trims in a concrete colour. Everything will need sealing/priming first. What paint products do you suggest? Is there one product that will do everything? Children will be living in the house once completed, so finishes need to be hard wearing and cleanable.

A. We recommend Resene SpaceCote Low Sheen and for wet areas, Resene SpaceCote Low Sheen Kitchen & Bathroom applied over the appropriate substrate priming system.

September 2019

Q. I need to seal a particle board floor, prior to carpet being laid.  Information about your product, Resene Particle Board Sealer, indicates that this product must be overcoated - is this still a requirement if the floor is to be carpeted?

A. Resene Particle Board sealer has been replaced with Resene AquaLAQ Quick Dry Sealer. If the sealed surface is to be carpet covered, then it should not need to be overcoated. I would stay away from carpet glue however, as we have not looked at this application for the product.

September 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. I have a new fence which is made from treated timber and I wish to paint it off-white. Would Resene Lumbersider be the right choice for this job? Will yellowing from knots in the wood show through?

A. Resene Lumbersider can be used direct to new timber; resin exudation is the main issue with fence palings. It is usually less likely to be an issue with white but can still occur.

Application of a coat of Resene Wood Primer will assist with this and also block any treatment staining. However, it is difficult to predict what the outcome of not using the primer would be.

September 2019

Q. I want to re-purpose a stained, solid wood set of drawers to go into a bathroom. What prep and undercoat do I use to waterproof them before I paint and, what topcoat would be best?

A. Using Resene Interior Paintwork Cleaner, ensure the surfaces to be painted are clean and free from grease, and pay particular attention to hand contact areas and then thoroughly sand to profile for painting. Dust off and apply a full coat of Resene Quick Dry primer undercoat and finish with two coats of Resene Lustacryl.

We cannot guarantee that there will be no colour bleed from the existing stain, if you see bleed after applying the Resene Quick Dry; apply a seal coat of Resene StainLock before topcoating.

September 2019

Q. My engineer letter states to use an inorganic Zinc Silicate Primer to a dry film thickness of 75 microns as per AS/NZS2312:2002. This is for paint for my steel brackets on my deck. Do you have a paint that conforms?

A. Yes, we recommend Resene Zincilate 11.

Note that the primer must be applied over steel abrasive, blasted to near white metal and before the blast level is lost. It's not recommended for a DIY project.

September 2019

Q. We have interior concrete floors that have been painted a multitude of colours over quite a few years, before we moved here.  One load of paint is epoxy covered, with a vinyl paint in some places that peels off when it gets wet. Some parts are bare.

Tomorrow we are getting a concrete grinder in to remove all the paint so we can start afresh. What do you recommend we use to repaint? It is garaging for two cars which go in and out reasonably frequently.

A. We recommend Resene Aquapoxy for Flooring.

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. I have moved into a new house and the painter hasn't sealed the MDF board in the bathroom and water has got into the board. I am going to replace it and we have leftover paint from the build. What should I use in the bathroom on the door and skirting? It will get wet from time to time from water under the shower door.

A. Prime the bare MDF with two coats of Resene Quick Dry then apply two coats of Resene Lustacryl topcoat.

September 2019

Q. I am a glass artist who cuts glass and makes collage glass wall hangings. I would like to know how to colour glass (like on a splashback), not onto toughened glass but normal glass so I can cut it with a glass cutter. I don't know how to spray, but if I could paint it on, in different colours that would be awesome. Colour would also need to last a long time and not fade.

A. When painting the reverse side of glass as is the case for splashbacks, the glass must be low iron. If you look side on at a piece of cut glass, you will see that is has a distinct green colour. This sees the colour viewed through the glass being very different from the back face colour.

Given that the colour is being applied to the reverse side of the glass, there should be no reason why the paint colour cannot be brushed with thinning.

September 2019

Q. I have a Honda 4X4 quad bike at the beach. It has light surface rust on the underside of the frame. I would like to try and give the bike a few more years of service life. It is a personal use of the bike, not commercial. Could you recommend a base coat and topcoat please? I am not really worried about how the final surface looks and prefer black.

A. Scrub down using Resene Paint Prep and Housewash diluted and used to label directions. Rinse clean or hose down with fresh water ensuring all salts are also 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,  taking care not to damage either the substrate or the surrounding areas.

Where under-film corrosion is taking place the existing paint must first be removed as above and remove under film corrosion products taking care not to damage sound zinc coated areas. All paint edges must be feathered to a smooth finish. Wet sand the sound paint, using 400 grit wet and dry to profile for re-coating.

Note: The performance of the subsequent paint systems will be largely dependent on the thoroughness of this surface preparation stage.

Ensure all edges of damaged paint are sound and immediately spot prime all areas of corrosion and any other bare metal with a full coat of the specified primer.

Then prime bare areas with Resene Armourcote 221 and apply a full coat of the primer and finish with two coats of Resene Uracryl 403.

September 2019

Q. I have an open plan lounge, dining and kitchen area. The ceiling is currently painted with a flat white paint and is in need of refreshing. The ceiling is in very good condition as the house is only 10 years old. However, the log burner has caused the ceiling to go quite black with soot/smoke. I have tried washing it off but it just smudges it further. What ceiling paint would you recommend I use and would I need to put some kind of undercoat on to cover the black first?

A. Apply Resene Sureseal to areas of smoke damage, then apply waterborne ceiling paint, such as Resene SpaceCote Flat or Resene Ceiling Paint.

September 2019

Q. We had our home painted in 2008 and we need some touch up paint - the colour was Resene Double Blanc - do you still have anything like this or can you help?

A. Yes, the colour formulation still exists.  However, when touching up the gloss level of the original paint it is just as important as the colour. If this is an exterior touch up, there will be significant reduction in gloss loss level and (possible colour change due to the action of weathering). This often makes a seamless touch up not possible.

September 2019

Q. I like Resene Nocturnal and Resene Alabaster. Can these go outside or can you help with what we can use?

A. Yes, we do not have separate interior/exterior colours. If using Resene Nocturnal for exterior painting, we recommend using the Resene CoolColour™ version not the standard colour.

The CoolColour topcoat will not render the painted surface cool to touch but the CoolColour version will reflect more heat than the same colour made on non-cool technology.

Dark colours may cause the rapid drying of damp timber with the ensuing danger of warping, though this effect will be lessened when a CoolColour is selected in place of a standard colour.

September 2019

Q. I am about to paint a new house. The weatherboards are 50x25 H3.2 radiata pine from KLC/South Pacific Timber. What is the best undercoat for these?

A. Sand any sharp edges on timber profiles to a rounded edge. This particularly applies to scalloped weatherboards.

Ensure all surfaces are clean and free from contamination before painting. Thoroughly sand the factory primer and then apply a full coat of Resene Wood Primer followed by two coats of Resene Sonyx 101 topcoat. If selecting dark colours use the Resene CoolColour™ version of the topcoat colour.

The CoolColour topcoat will not render the painted surface cool to touch but the CoolColour version will reflect more heat than the same colour made on non-cool technology.

Dark colours may cause the rapid drying of damp timber with the ensuing danger of warping, though this effect will be lessened when a CoolColour is selected in place of a standard colour.

September 2019

Q. I am looking at staining some wooden toys and just wonder whether the wood interior stains would be appropriate. They are toys not designed to go in the mouth but with kids you never know.

A. Resene Colorwood is an Resene Environment Choice Approved product and will be suitable for staining wooden toys.  The stained timber is usually protected by application of Resene Aquaclear, which is also Environmental Choice approved.

September 2019

Q. I have replaced some cement panels on the exterior of our house - on the triangular end sections below the soffit above the weatherboards, what sealer/undercoat/finish products do you recommend?

A. Prime the new fibre cement with Resene Concrete Primer then apply two coats of Resene Sonyx 101 or Resene Lumbersider.

September 2019

Q. Can I seal a concrete floor and also put carpet down? If it's sealed and the carpet fitters glue down the underlay, will this affect the sealing?

A. Check using the water splash test, for the presence of a curing membrane, water splashed onto the concrete should immediately darken the concrete and be absorbed. If the water is not immediately absorbed and the wet concrete does not darken, then this indicates the presence of a curing membrane. If there is curing membrane present then diamond grind, to remove the curing membrane to achieve a uniform surface profile similar to 180 grit sand paper. Ensure all grinding dust is removed, this may require wet mopping.

Apply two coats of Resene HydraBlock epoxy coating at 10 square metres per litre per coat.

September 2019

Q. If I have got a musty smell out of my drawers, can I paint them to stop it coming back and if so, what paint do I use?

A. The musty smell is usually indicative of bacteria or mould being present.

Wipe the surfaces down with Resene Moss & Mould Killer diluted and used to label directions, then apply a full coat of Resene Quick Dry primer undercoat and finish with two coats of Resene SpaceCote Low Sheen Kitchen & Bathroom.

September 2019

Q. I have a large Totalspan COLORSTEEL® shed 480 sq m which is about 15 years old. Is it possible to paint over the COLORSTEEL® to change the colour?

A. Wash down with Resene Roof and Metal Wash diluted and used to label directions to achieve a clean, chalk free surface. Then apply a full coat of Resene Pre-Coated Steel Primer and finish with two coats of Resene Summit Roof.

September 2019

Q. We have a conservatory area with polyurethane finished douglas fir rafters that have become water stained. What would be the best way to renovate these rafters so that the water stains are no longer visible? We would like to retain the natural timber finish if possible.

A. The only way is to strip the clear varnish back to bare timber then thoroughly sand to remove the water staining, or treat the bare stained areas with a 5% solution of oxalic acid, then sand.

However if you reapply a clear, the staining may reappear unless the water source that is generating the staining can be identified and blocked.

September 2019

Q. We have plastic glossy walls in our bathroom. Are there any paints in the Resene range that we could paint over this with?

A. The existing paint is probably solventborne enamel paint. To recoat these paints they require a clean and thorough sand to profile for recoating. Then apply a full coat of Resene Quick Dry primer undercoat. Then apply two coats of Resene SpaceCote Low Sheen Kitchen & Bathroom.

Ensure good ventilation during painting and allow the new paint system to cure for at least three days with good ventilation before recommissioning the bathroom.

September 2019

Q. My bed has left a mark on the wall, which I then tried to scrub off but had no luck, so I tried to paint over it trying to match paint, also didn't work, so I tried to scrub that off and I've scrubbed off too much paint in areas and basically just made a mess of it.

I need some help with either matching paint to the wall or if worst comes to worst then repainting the room.

A. Assuming the existing wall paint is waterborne, lightly sand the area to be repaired with 240 grit sandpaper, dust off and spot prime with Resene Quick Dry then apply two coats of colour in the same gloss level as the existing paint (thin the portion of touch up paint with 10% water). Feather out to blend into the existing paint. If touching up using a different application tool to what was originally used then this can make the touch up more obvious.

September 2019

Q. Can you add Resene MoulDefender to decking stains?

A. There should be no need to, as the decking stain formulations contain mould inhibition additives. Resene MoulDefender is primarily focused for interior use.

September 2019

Q. Could you advise of the best materials/paints to prepare and paint an internal brick wall/wood burner surround?

A. Our criteria for painting in this situation is that you must be able to maintain hand contact on the areas to be painted when the fire is at full heat.

If this is the case then apply a seal coat of Resene Sureseal followed by two coats of Resene Lusta-Glo enamel.

Over time, light topcoat colours will yellow. There is no waterborne system for this application. In the early stages of using the fire there may be a solvent odour released as the paint becomes hotter but this will dissipate. It's best to allow ventilation during early use.

September 2019

Q. I need to specify paint for a footbridge walking surface.  Would you recommend a product. I am most concerned about coefficient of friction and durability - is it acceptable to paint only the top surface and what conditions does this need to be completed in?

The substrate is rough-sawn timber in an external environment on the West Coast, exposed to rain and approx. 500m from the coastline. The bridge is reasonably used with all kinds of footwear.

A. The only system we could offer would be to prime the decking with Resene Wood Primer and then apply two coats of Resene Non-Skid Deck & Path.

September 2019

Q. After two coats of Resene Lustacryl on interior French windows, when it is safe to blade back the glass? In other words how many days after the second coat? 

A. You'd be safe to do this after a few days, although if you can wait a week or two it allows the paint to cure. Ensure that you take care around areas you don't want to remove of course. Use a Stanley knife for nice straight lines.

September 2019

Q. I have white Resene Lumbersider spilled over my new concrete driveway, I tried to wash it off but it's still there and it's been about 3 months now.

A. You could use Resene Graffiti Cleaner to remove the paint. It will really depend on if it has penetrated into the concrete, as to whether you can remove it completely. You could also try waterblasting.

September 2019

Q. We have recently moved a glasshouse to our property and wondered what you recommend to paint the glass with, to protect the sun sensitive plants.

A. Often shade cloths etc. are a good and cost effective option to protect plants against UV as once the glass is painted you can't remove it.

However, to paint out glass we recommend (following a good clean down of the glass) applying an adhesion coat of Resene Waterborne Smooth Surface Sealer - allow to dry for 2-3 days as this will aid adhesion to the glass then topcoat with two coats of Resene Lumbersider.

Select a lighter colour, as dark colours could cause heat stress on the glass. White is best to deflect heat.

September 2019

Q. Can you tell me please what makes Resene AquaShield a good product to put on exterior stucco cement plaster and what does Resene product description mean when it says that it gives a 'Mediterranean look'?

A. Resene AquaShield is a flat mineral effect type coating which gives it that ‘Mediterranean' look i.e. that type of coating/look you commonly see on older buildings in Italy, France etc. It is a great match for the look of stucco houses.

It has a hydrophobic nature to it, so water will bead up and roll off the surface more than a standard paint coating. This means that you will get less dust and grime build up on the surface.

It also has the best level of Moisture Vapour Transfer in our range therefore is our most breathable coating.

September 2019

Q. We have an issue with efflorescence and slight water leakage on the internal concrete wall of our garage. There is no access to the external face of the wall as it is below ground level, Is/are there any Resene product/s that will seal the concrete from the inside/internal wall and prevent the issue we are facing. The house was built in the mid-1970s.

A. Thoroughly wire brush to remove any remaining efflorescence. Apply a saturation coat of Resene Solventborne Aquapel to bare concrete and leave to cure for at least 48 hours with ventilation, to allow for solvent removal from the room. Then apply two full coats of Resene HydraBlock.

September 2019

Q. My bedroom wardrobe was painted with foul smelling old paint that had gone off (I'll never know why). The smell is very strong and horrible and it's all through the house. Is there a product I can use to seal in the smell? I'm due to have new carpet laid in 4 days. 

A. If the paint was a waterborne paint, it may have been contaminated with bacteria. If this is the case then wipe the areas down using a bleach solution such as Resene Moss & Mould Killer diluted and used to label directions. Wipe down with water and a cloth after this treatment then allow to dry.  Then apply two coats of Resene Quick Dry primer undercoat. As long as the mould treatment is effective, Resene Quick Dry has a package to inhibit future mould growth. If you want a specific colour overcoat, paint the primed areas with two coats of Resene SpaceCote Low Sheen Kitchen & Bathroom.

September 2019

Q. We live on a cliff right above the sea and we have had a new deck built. A steel frame consisting of two pillars and a large cross beam have been installed. This was manufactured in three sections, galvanised and epoxy painted. This was then erected using large bolts that my magnet sticks to very well suggesting that they are not stainless steel.

A couple of small scuffs and scratches were made during installation.

I need an external primer or sealer that will seal this steel to prevent any rust forming. I then need to paint them with a waterborne paint that I have used to paint all the timber pillars around the house.

A. Wash down the areas to be repaired using Resene Roof and Metal Wash diluted and used to label directions. Sand the existing epoxy coating to profile for recoating and feather off to a sound edge then spot off 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 at least two coats of Resene Armourcote 221 epoxy primer over areas primed with Resene ArmourZinc 120.

Epoxy based cession systems are normally overcoated with a two pack polyurethane topcoat to give a weatherable topcoat. Resene exterior waterborne topcoats can be used but these do not achieve the same level of adhesion as a two pack polyurethane.

When applying topcoats to existing epoxy coating, ensure the existing coating is scrubbed down using Resene Roof and Metal Wash diluted and used to label directions to be chalk free then sand to profile for recoating.

September 2019

Q. I want to paint my 1950s weatherboard house. I'm pretty sure the weatherboards and windows are hardwood. I'm not sure exactly what wood. I'm planning on sanding the flaking areas of paint and spot priming before painting. Can you suggest the best way to prime/paint the hardwood?

A. Full preparation information is below for you. For paint products use:

  1. Spot prime with Resene Quick Dry
  2. Two topcoats of Resene Sonyx 101
  3. Spec Sheet 2:1/3 - Previously Painted Exterior Timber, Weatherboards and Plywood

Generally, painted exterior timber will be in reasonable condition with some moss and mould on the surface as well as salt, dirt and other contaminants and detritus. The degree of failure of the previously applied coatings will ultimately determine the amount of time and cost spent on preparing the surface (see also the notes above).

Where the paint surface has badly deteriorated, more extensive preparation, including possibly complete removal of the coating, may be required.

Step 1:  Treat moss and mould with Resene Moss & Mould Killer diluted and used to label directions.  For heavy infestations an additional application(s) may be needed.

Step 2:  Thoroughly scrub down using a solution of Resene Paint Prep and Housewash and water to remove all surface chalking, dirt, detritus, moss and mould residue, cobwebs and other contaminants. Use as directed on the label.  

Step 3:  Thoroughly scrape and sand to remove all loose and flaking paint to provide a good key for subsequent coats. Sand any grey weathered bare timber back to a sound timber surface. Ensure all areas of flaked paint are thoroughly sanded to a feathered edge. Ensure any sharp edges are arrised to a rounded profile.

Note II:  Remove or punch in any rusty nails and replace with galvanised or stainless steel nails as is appropriate. Any exposed nail heads unable to be replaced should be punched and spot primed with Resene GP Metal Primer, if practicable, and fill with Linseed oil putty. Any rust stains should be spot primed using Resene Wood Primer.

Step 4:  Spot prime all bare timber (including nail holes) with the specified timber primer. 

Step 5: All nail holes or areas of damaged timber having first been primed in Step 4, require filling with Resene EzyFill GP or similar, in accordance with manufacturer's instructions. Sand smooth and spot prime the filled areas, with specified timber primer.

Note III:  Treat rotten and cracked timber as per Spec Sheet 2:1A/3.

Note IV:  Where paint coatings need to be stripped refer to Spec Sheet 2:1B/3.

Note V:  Before beginning any surface preparation, tests should be done to ensure the old paint does not contain lead. Paint flakes with layers older than 1970 are likely to have lead in them. If lead based paints are identified on this job, then the OSH Guidelines for the Management of Lead-based Paint must be read and followed. Where these guidelines are in conflict with any part of this specification, the guidelines must take precedence. Flakes of lead paints and any sanding dust need to be carefully managed and disposed of.

Note VI: Older timber weatherboard clad homes, especially those located close to a coastal location are likely to have rusting nails which are susceptible to bending and breakage when weather boards undergo dimensional change such as can occur when there is a colour change to dark colours. We recommend replacement of nails with new galvanised or stainless nails to ensure dimensional changes are minimised.

September 2019

Q. I have a new treated pine deck being built at present and am looking at your Resene Woodsman Decking Oil Stain. I want a durable product for an area that will be in the shade and wet for a lot of the year, and since I don't want any tracking inside and the most mould-resistant option thought this might be the best product? Is the CoolColour optional or is it a standard additive? What effect will it have on durability, look etc. of the product? Also, looking at the chart it seems it is not indicated for outdoor furniture and walls. We want to stain (and maybe later paint) a new pine adjoining shiplap wall and we also have a hardwood bench.  I'm concerned the product is not indicated for this use, and want to know why please? Also, with regard to mould resistance, is this your best product (decking or furniture)?

A. A Resene CoolColour™ system will not render the painted surface cool to touch, but the CoolColour system will reflect more heat than the same colour made on non-cool pigment technology.

Dark colours may cause the rapid drying of damp timber with the ensuing danger of warping, though this effect will be lessened when a CoolColour is selected in place of a standard colour. The CoolColour system will reduce but not eliminate heat related stress on the substrate.

There is no benefit in applying a CoolColour paint to areas that are not subject to full weathering/sun exposure.

Resene stains are designed to erode upon weathering, the erosion may release pigments that can be foot tracked inside but washing during rain usually sees the pigments being washed off the surface. This is the reason why we would not recommend its use for furniture as pigment transfer to clothing is a possibility.

The stains will not kill existing mould/algae but will inhibit growth; if the stain maintenance is not undertaken on a regular basis then mould growth can occur. Once this occurs, treatment with Resene Moss & Mould Killer is required to address future mould growth.

With some products we have a more clearly defined area of use – e.g. Resene Woodsman Decking Oil Stain. Resene Woodsman Wood Oil Stain has a wider use and hence there is no specific reference to use. We define our exterior stains as non-film forming, this allows for easy restaining as there will be no peeling/flaking as occurs with film forming stains.

September 2019

Q. We have a new Pinex ceiling which is very porous. Can you suggest an undercoat or suitable sealer?

A. Resene Sureseal would be our recommendation.

September 2019

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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