i painted my calipers using some standard spray paint, good stuff though cant for the life of me remember the name but its a good brand, not hammerite but still an excellent quality. didnt use any primer, just sanded down the caliper and made sure it was bone dry and smooth, then applied 3 good coats of the stuff

. Im going to start a mini progress thread soon when i get time but so far its been a good month or two and it looks brilliant.