you won't go wrong with the klasskote, just add thinner til it sprays good. start at 1,1,and 1. the white primer works great if its not too hot. we were trying to spray at 90+ degrees, and found that the paint was catylizing at the tip at that temp. the guy at klasscoat said we don't need the white primer for wood, as that is made for metal (cars) to act as a corrison inhibiter. bought some of their white paint and used a flat hardener. it dries very fast and sprays at the hotter temps with no problems, but does not contain the corrrison inhibiter that their white primer has