I advise against using caliper covers. Covering the brake system with calipers covers causes the brakes to hold more heat.
In my opinion, I feel the only vehicles that should run caliper covers are show cars that never get driven any miles on public roads.
Go with painting the calipers. What color(s) are you considering?
"Why would I want to profess my feelings for some 3D girl?" - Tomoya Aki from the anime Saekano