unless you bought the high temp por15 don't touch the exhaust, it'll end up peeling off after a week. i did everything in sight under my tub that didn't move. frame, tub, axles, diff's, gas skid plate, uhaul hitch brace, sway bars, trackbars, spring perches etc.. took me all day to do! by the time i got the first coat on it was already to start back at the beginning for the second. also, that stuff stays on your skin for a solid week at least. so just beware, and anything that you wear, will be ruined, so wear something you don't care much for!