Prepping and priming are where its at. A well sanded, thickly primed, tank will glow when buck a bomb paint goes on. Using good paint on a poorly prepped tank is a waste of good paint. Radiator Paint [ paint store ] hides flaws in metal, has an alloy like glow, tough as H ***
Rustoleum has a new line of tough paints. Did my truck bumper [ chrome ] and Grille [ plastic ] recently ... time will tell