When I was in HS I did the calipers on our 91 Escort GT in red rustoleum, did just a wire brush and paint thinner for prep and they stayed pretty good for years. The car was silver but had some red pinstripes so the red matched the car well. The stock wheels didn't have huge gaps and the caliper was tight to the wheel so you couldn't see the whole caliper either. The biggest pain was trying to keep the caliper clean as now dust and dirt showed up... I did some autocross but it never heated the brakes up enough to discolour them.
For my cars now I would do the calipers in black rustoleum and never touch them again. Probably the paint will stay on but if not, it won't look any worse than no paint.
For my cars now I would do the calipers in black rustoleum and never touch them again. Probably the paint will stay on but if not, it won't look any worse than no paint.