hey man, ive done this before, go to Napa/Autozone/AdvancedAutoParts(cant remember which one, go on S. Salina they are all next to each other) and buy a brake caliper painting kit, it comes with a spray, tis a primer and rust remove, buy a stainless steel brush, and that paint stays on forever.. .ive seen some ricers try to use spraypaint, seriously after a few weeks its gone