I did it (black to match the bike), and as long as you have a way to remove the powder coat from the braking surface, you will be happy with the result. The place I used, turned them just like they do when a brake shop resurfaces rotors, but they only removed the coating.
I would think that the same result could be had with hi-temp paint, for less $$ and less work. It's been 7 - 8 years and over 50K, and they still look pretty cool.


Black Dog