b'gold standardWhat about whites? The physics of white light scattering means that light hastheyre not intended to be used verticallyso getting the correct As we mentioned earlier, white paint colours often provide betterto bounce off the pigment particles and not be absorbed bycoverage on walls can be very tricky. While it may take slightly coverage than other colours by the very nature of their raw materialanything, otherwise the colour would appear greyeven if thelonger to specify a second or third product, its well worth the componentsbut not all whites provide equal levels of coverage.light waves only spend nanoseconds bouncing around insideeffort to ensure the coatings on your project are right for each Pure whites do not hide the substrate as well as undertone whites,the white paint film before being scattered to the observer,surface theyre being applied to. This way, you and your client can which have a touch of another coloured pigment added to themexplains Greg. Some of those light waves may get absorbedbe certain that theyll perform as intended and your design willwhich is the case with Resene Alabaster, one of Resenes mostby the substrate and never get back out of the paint. Thekeep looking great for years to come.popular paint colours. purest white light scattering is about 98% of the incident light, as 2% of the light will be absorbed and lost due to the physicstop tipof light refraction. For a full white paint with no undertone colour, you need at least two coats applied at the specifiedThe quantity of paint product required to cover ceilings versus spreading rate to achieve full hiding coverage. Many cheapwalls versus trims and doors are all different. Use the free online paints require three or four coats, as their white paint containsResene Paint Calculator at www.resene.com/paintcalculatorless titanium dioxide than Resenes does. Titanium dioxide isfor recommendations of how much product will be neededthe costliest component of white paint, but its also one of thefor your project.most important as it has the highest known refractive index of any colourless material. Troubleshooting tipsSee-through coatings With all of this in mind, if you spot a coverage issue on site, your Inmostprojects,therearesomesurfacesthatneedtoberecourse will depend on the surface youre coating and what completely coated but not completely covered up. Resenesproduct youre coating it with.wood stains and clears are a different case as they are designedWith most waterborne paint systems, once the paint is dry, to be semi-transparent or completely transparent, so they haveyou can put on an extra coat without any issues. But with some almost no coverage on an opacity or hiding basis, says Greg. solventborne systems, the application time window can be quite Oneofthebiggestcoverage-relatedissueswiththesetricky, says Greg. When the solventborne paint is first touch products is over coverage, where too much product is applied.dry, you can put another coat on, but if it has been left too Wood stains are designed to penetrate the timber, but if toolong the first coat starts to cross-link or cure, but the level is much stain is applied, the stain will end up sitting on top of thenot enough to protect it from the solvent of the second coat. wood instead of penetrating in. If the product is not able toThis means you can get wrinkling or other visual defects. If you above: One of the most common mistakes made when staining timberpenetrate the surface of the timber, the product can be tacky orleave the first coat on long enough to dry (24 to 48 hours), is that applying more product is better. Sometimes, it is done to try andthe cross-linking will be much greater and the first coat will be save time. Others incorrectly believe that a thicker coat will offer betterfailso its important that it be applied in thin, even coats andresistant to the solvent from the second coat. However, you protection, but that is not how Resene wood stains have been designed. Into wipe away excess interior stain before leaving it to dry. If moremay sometimes need to lightly sand between coats to guarantee fact, applying too much product at once can cause the product to fail. Inpigment is desired, continue to apply additional thin, even coats order to provide the timber surface with the advertised level of protection,until you build up enough depth of colour to get the look youregood adhesion.Resene interior wood stains need to be allowed to properly penetrateafter or choose a darker colour. If you find there is a defect between the first coat and the the timberwhich can only happen by applying it in thin, even coats andClear coatings are another product where building up thinnersubstrate (such as peeling, blistering or delamination) when using a wiping off the excess product as directed. Too much wood stain applied incoats is better than trying to apply the product too thickly in lesscoat will make the problem worse in most cases. In these instances,Land and seasolventborne two-pack product, Greg says that applying a second a single coat can also obscure and detract from the beauty of the timbers natural grain. The quarter circles show unfinished pine (right), pine withcoats. Be sure to follow the application instructions on the datait is recommended to remove the first coat and start again. a single coat of Resene Colorwoodsheet or product container for optimal performance.Nutmeg applied as directed (middle)Reseneand pine with far too much ReseneAlabaster Fit for purpose For more troubleshooting advice, use the Resene Ask a Paint Expert Colorwood Nutmeg incorrectly appliedResene Colorwood service, www.resene.com/paintexpert or call 0800 RESENE (737 363) in (left). Timber background finished in aWhitewashAnothercommoncoverage-relatedquestionthatgetsraisedNew Zealand or 1800 738 383 in Australia. For other coverage-relatedTwo award-winning exhibitions reference precious single coat of properly applied ReseneResene Colorwoodis whether or not Resenes floor finishes can be used on walls.or product queries, ask your Resene Representative or talk to the team Colorwood Whitewash. Nutmeg Since these products are designed for easy spreading on flooring,at your local Resene ColorShop. taonga to build captivating Resene colour palettes.42 blackwhitemag.com blackwhitemag.com 43'