Welcome.
Powder coating the brake calipers is the best way to keep them looking great for a long time, however it is a chore to do since they need to be removed, disassembled, and thoroughly cleaned. I did a set of aluminum twin piston front calipers from a Camaro to put on as a brake upgrade for a 02 Grand Prix GT. They were Candy Lime Green with a Silver metallic base on a dark blue metallic coupe. They looked Sick and the finish held up extremely well for one of my first try's at powder coating and with my brother never cleaning them. The brake rotter needs a high temp finish since my brother baked the finish off with a freeway speed emergency stop in traffic, but the brake upgrade saved him from totaling the car many times. Painting is cheap and easy, but needs to be redone once a year and as brake dust builds up it never really cleans off completely and leaves a slight stain. I haven't had time to try any high temp powder coats on rotters yet, but ill post feed back if i ever get to it.
Brake calipers do not get nearly as hot as rotters do so you can coat them and shouldn't have a problem. Many aftermarket companies PC there calipers that i have seen.