How To Paint Brake Calipers
After disassembling, cleaning and inspecting, the next step of caliper rebuilding is a quality paint job. Painting is all about surface preparation. To prevent chipping and peeling down the road, you need to start with immaculately clean calipers. Careful preparation is essential.
The calipers in these pictures are from a 1966 Corvette. They were initially cleaned during disassembly, but more cleaning was done before painting. I sprayed the calipers with brake parts cleaner, then scrubbed them with a wire brush. For the tight spots I used scuff pads, followed up with more brake parts cleaner. After blow-drying with compressed air I allowed to dry thoroughly.
The piston bores and bleeder valve holes are not to be painted, and need to be covered up during the painting process. I put old bleeder screws and stuffed rags in the bores, then reinstalled the old bore seals.
After the painting was done, any overspray on the mating surfaces of the caliper halves was sanded off.
brake calipers ready for paint
Brake Caliper Paint Choices
There's a dozen or more products which can be used to paint brake calipers. After doing some research, I chose VHT brake and caliper paint, which I bought at a local AutoZone store.
VHT caliper paint is heat resistant to 900 degrees. If instructions are followed, the paint will not chip, crack, fade or rust, even under extremes of operation or road and weather conditions. It is easy to apply, dries quickly and is remarkably resistant.
Several light coats of paint achieve best results. The point of spraying many light coats is to eliminate runs, and will dry completely before the next coat. For the first pass, spray lightly and aim for the hard-to-reach areas.
Although you could respray as soon as 15 minutes, what's the rush? Remember changes in temperature and humidity are not always known. Take your time. You're not painting a barbecue, you're restoring a classic car.
I put on about four coats which took me four days. Each morning, before work, I went out in the garage, changed the position of the calipers on the cardboard, and sprayed another light coat. I sprayed the last coat a little heavier to smooth out the finish.
Heat Cures The Paint
After allowing the calipers to dry for at least day, set your kitchen oven to 200 degrees and "bake" the calipers for one hour. This cures the paint, making it rock hard and impervious to chemicals. (Wait until your wife leaves the house to perform this last step.)