Joe. have used POR15 extensively on Chassis, underbodies, etc. As others have said prep is the key and the stuff is like iron. I sprayed a frame with it in a homemade booth with fans, wore a respirator, and still felt weird for 2 days. POR15 does not work like ordinary paints that rely on solvents to dry. It reacts on some sort of chemical reaction that dries up all moisture(or at least encapsulates it) so it is VERY DANGEROUS for the lungs! I talked to a so Cal dealer who tried spraying it w/o a respirator and it mput him in the hospital for 2 weeks. Said he almost died. So be careful, and as stated before, wear gloves and be extra neat with it. Good Luck!