I agree with RapidRobert on degreasing it, he uses starting fluid, I use laquer thinner. Will kill just about any leftover greases/residues. I tried to rush one once, then had to do it over in 6 months........the paint lifted in several areas. I am sure it was because I skipped that step........it has been fine since I re-did it RIGHT..........here is my Dupli Color 340.