Planning for wood finishing also involves being aware of how the finishing process influences the end result. Some tropical woods, such as rosewood ( Dalbergia nigra), cocobolo ( Dalbergia retusa) and African padauk ( Pterocarpus soyauxii), contain extractives such as quinones, which retard the curing of unsaturated polyester and UV-cured acrylate coatings, and so other finishing systems should be used with these species.
The pores in ring-porous woods more readily absorb pigmented stain, and advantage can be taken of this to highlight the wood's grain. Woods that are coarse textured such as oaks and other ring-porous hardwoods may need to be filled before they are finished to ensure the coating can bridge the pores and resist cracking. Alternatively, the wood can be bleached to remove the natural colour of the wood and then stained to the desired colour. For example, woods that show great variation in colour between sapwood and heartwood or within heartwood may require a preliminary staining step to reduce colour variation. Planning for wood finishing also involves thinking about the properties of the wood being finished, as these can greatly affect the appearance and performance of finishes, and also the type of finishing system that will give the wood the desired characteristics. Care should also be taken to eliminate recesses in furniture, which are difficult to finish with some systems, especially UV-cured finishes.
#EDGE BLENDING COAT BUFFING CRACK#
Careful attention should also be given to the design and strength of wooden joints to ensure they do not open-up in service and crack the overlying finish. Care should be taken to ensure that edges of furniture are rounded so they can be adequately coated and are able to resist wear and cracking. Planning for finishing begins with the design of furniture. 6 Comparison of different clear finishesįinishing of wood requires careful planning to ensure that the finished piece looks attractive, performs well in service and meets safety and environmental requirements.I had a small sand through on signature car fender except is a bit deeper than most: Generally you can just shoot more clear over the exposed base without any issues. I am not an expert by any means but this worked for me and I hope it does for you as well.Īctivating the base coat helps in these instances. Remove the masking from the entire panel where the sand through was and prepare to spray your clear coats over the entire panel. Be sure to spray light coats of base until the blend is just the way you want it.ġ1. Make a couple of more passes using the "wrist technique" with each pass going a little farther than the last but not reaching the tape line. By now you will see that things are shaping up and the sand through is pretty much invisible.ġ0. Make a couple of short passes over just your sand through for good coverage. No need to sand just begin spraying your base coat very light coats. Mix your base exactly as you did when you first painted the car.ĩ. Allow this to flash while you mix your base coat. This helps greatly in getting a perfect match/blend.)Ĩ. (Note: the intercoat clear allows you to "see" the true color of the paint surrounding the sand through. Remember your base coat will be sprayed on this inter-coat so give yourself some room to work. Spray a couple of coats of the reduced clear with the second coat extending past the first coat to kind of feather the edge. You will start and stop your passes using your wrist in this manner.ħ. Imagine you are spraying an inside 90 degree corner and you have to turn your wrist to keep from loading the paint into the corner. Stop a couple of inches short of that and using your wrist you want to sweep the gun away from the surface. You want to go past the sand through area with each pass but do not go all the way to your masking tape. Spray the blend area with the reduced clear using light coats as you would base coat. (Note: Now I keep SPI intercoat clear on hand for this purpose.)Ħ. I mixed up a small amount of reduced clear to use as in "inter-coat." This is done by using 30 parts clear, 10 parts hardener, 90 parts reducer. Let this dry while you get ready to spray - 20-30 minutes.ĥ. Wipe your panel clean with Wax and Grease Remover. You don't want to mask too close or you'll leave what they call a tape line.Ĥ. Now mask off the panel you are working on (this will be removed before clearing and helps keep you focused on the repair area) making sure to leave plenty of room around your sand through for your blend. Mask off the rest of the car to prevent over spray from getting on your nice paint leaving only the entire panel you are working on exposed.ģ. Sand the entire panel where the sand through is with 800 grit until dull.Ģ. This was my first attempt at blending paint so I was extremely nervous.ġ.
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