I painted brand new wilwood calipers black->red when I put them on the my 350z so it can be done on the car. Lots of good prep cleaning and good tape up is required.
DIY Brembo Caliper Painting ... the easy way - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com Is a good way to do it.
Aiming for Brembo gold or ?