Brake calipers are exposed to constant heat cycles, brake dust and various environmental substances all the time. Because of this, they have a notorious reputation for looking aged rather quickly. It's a good idea to refinish your calipers as you will not only have a chance to make them look new again, but you will be able to protect them against any further corrosion and rust.
First, we want to prepare the brake caliper for paint. With road dirt and grime, start by using a degreaser and a brush to clean the brake caliper.
To begin with, we want to make sure we have a clean surface so that the new coating will adhere to the brake caliper. If you have surface rust or corrosion, use a wire brush and or a light sanding paper of 500-1000 grit. Scuff up the surface of the brake caliper so it has a dull sheen to it.
Next step, using a brake cleaner, spray your calipers so get rid of any last bits of dirt, grime or grease that may still be left on the caliper.
Note: You can remove the calipers to paint them, but you can also paint the calipers while still installed. You will need to mask off everything around the caliper that isn't getting painted.
Using a high-temperature primer, apply 1-2 coats of primer. Light and even coats are the key to success here and you want to wait about 10 minutes between each coat.
Once the primer is applied, wait another 10 minutes and apply the paint you are going to use for the calipers. We suggest 3 coats evenly and lightly applied also with 10 minute intervals.
Finally, wait another 10 minutes after the last color coating, and apply 2 coats of high temperature clear coating. This provides further protection to the paint and you also have to choice of a glossy finish or a satin variant to make your brake calipers more subtle.