Brembo states this about the color of its calipers: "The Brembo paint cycle is a long and complex process, which Brembo has perfected over the years. It includes, among other steps, applying an epoxy primer, polyurethane paint and transparent acrylic paint. A dedicated system is used. A tunnel is used for 3 phases of pre-treatment spraying: the cycle includes painting booths and a baking oven. Color is then applied to the calipers: this is done by hand and workers are specifically trained for the task. The calipers are then sent to another special oven. The next step includes branding the brakes by means of screen printing and tampography. The painting process is completed by adding a transparent layer of paint. Brembo complies with rigid procedures to ensure that the color won't change over time. Several environmental tests are used for each color being produced and for each paint category, to guarantee that the paint will resist various liquids (e.g.: water, brake fluid and oil) as well as environmental conditions (humidity, temperature, thermal shock). Tests also verify long term durability in all conditions (including the paint's resistance to being hit, by rocks for example) and corrosion resistance."
(rhetorical) Where do you GET this stuff, Tom? That is some top-quality information right there, well worthy of the read.
The information was taken from Brembo's website. 5 reasons not to use repainted brake calipers | Brembo - Official Website
