on my volvo i used hi temp engine block paint. got it at an automotive paint shop. you will need to take off the calipers and clean them thoroughly. I used MEK folowwed up with laquer thinner.
THis is the best I have w/o going to take new ones. I went with black b/c I didnt want it to be too noticable but still some. Also, when you paint, cover all the little gold screws with masking tape -- Gives it a more professional appearance when youre done.