Painting steel rims and baking the paint.

a lot of the high heat products require you to bake them for hours in thermal cycles for correct cure.

with the modern paints available i think there are better options, and pricing (have you *seen* the price of VHT lately?!?).

if you're not particular about color, appliance epoxy will cure tough as nails. for plain finishes of black you can't go wrong with pretty much any flavor of chassis paint.

rustoleum industrial black is always a favorite. it's cheap, wears well and can be touched up easily if you catch a curb or some debris.

as mentioned, prep is key.