Just to let you know, ive just painted my calipers 2 days ago using color care engine laquer paint. its available in most colours but i used silver paint with black calipre stickers on top.
the paint went on brilliantly with no mess, the first coat was dry in less than 10 minutes and after a second coat i waited another 20 minutes before applying the stickers. no need to wait days for the paint to harden off.
The only thing to watch for is dont spray them with laquer afterwards as it can react with the paint.
the paint cost me less than 4 quid !!!!! and ive got enough left for the next 10 years