+ 1 on the yellow cad coating. Unless you want concours restoration, another color may look better.
Gold line brakes in Seattle, WA does complete, no BS caliper rebuilds, and polymer coats brake calipers in any color you like. Red is good. They say that the polymer coating does not form a thermal barrier.
Porsche 911 Carrera Brake Calipers Pictures - Rebuilt Disc Brake Calipers
Great service and reasonably priced. How can you beat that?