You painted your brake calipers for a sharp look, and weeks later the paint is bubbling, flaking, or discoloring. Peeling caliper paint almost always comes down to two things: the wrong paint or poor preparation. Here is why it fails and how to get it right.
The wrong paint for the heat
Calipers get hot - see how hot brakes get - and ordinary spray paint cannot take it. It bubbles, discolors, and peels within weeks. You must use paint specifically rated for brake calipers (good for several hundred degrees). Using the correct high-temp caliper paint is the single biggest factor - see painting brake calipers.
Poor surface preparation
Paint only bonds to a clean surface. If the caliper had brake dust, grease, or rust when painted, the paint peels as that layer lets go. Thorough cleaning with brake cleaner and a wire brush before painting is essential - skipping prep is the second big cause of failure.
Not curing it properly
Caliper paint needs to cure and then heat-cycle to fully harden. Painting too thick, not letting coats dry, or hard driving before it cures can all cause peeling. Follow the product's cure time and do a few gentle heat cycles first.
Redoing it right
To fix peeling paint, strip the old paint, clean thoroughly to bare metal, mask the bleeder, boot, and hose, apply proper high-temp caliper paint in thin coats, and cure it. Remember paint is cosmetic only - it does nothing for braking; keep the calipers healthy and pair the look with quality pads and fresh hardware.