dose anyone around you do powder coating ? that would be a nice way to go but probably a little over kill. to be honest if you are painting it black i would just go with a rattle can because of how well the paint adheres to everything and is pretty durable. i wouldn't go with any sort of car paint unless you are going for looks. if u are going for looks i would use adhesion promoter and a single stage paint, not a base/clear coat system. and i wouldn't worry about heat to much ether. the front of the pump will probably be the hottest if u are concerned though.