I like DuPont products for the most part. I like thier acrylic enamel (don't use it anymore but just for signs). Thier Chromabase/clear is nice to work with, predictable and durable. The Ultra Productive clear is very nice for motorcycle and other small parts, as it kicks of in only a couple of minutes! I realy like the RM paints, even eassier to work with than DuPont and I like the shine, it seems more "sophisticated". Never liked PPG, always had problems with it, either too soft or poor sheen and not very durable. I had one single stage urethane PPG job that you could indent and scrape off with your fingernail, it had good shine, but felt like 600 sandpaper. Won't use it again. I have gone almost exclusively with RM, unless I need it quick and then I use Sherwin Williams (NAPA, Martin Senior) because they are local.