I did my Audi S4 in red and this was the kit that I used. They looked good for about 4-6 years before the paint started looking closer to pink. I drove many track days in that car and generated enough heat to warp 3 sets of rotors, so I would say it is good stuff.
It is a thick paint, so you don't have to worry about total disassembly like you would with powder coat.
http://www.g2usa.com/product/G2.html
I have painted both my vehicles with G2 caliper epoxy/paint. I did a 2014 Mustang in a special G2 color matched version (Gotta Have it Green) and they look like the day I painted them (2+ yrs ago). I have also done my truck calipers with G2 Black. I would say that, in my experience, the G2 caliper epoxy/paint is the next best thing after powder coating. In fact I specifically chose not to powder coat and use G2 instead.
Look up G2 Paint, it is somewhere between cheap paint kits and powder coating in durability. As with all paint it is in the prep. I recommend if you use the G2 keep the paint itself in an ice water bath to retard the reaction until you get it on the calipers. It is in essence a 2 part epoxy paint.
http://www.g2usa.com/
Alright, yall convinced me. Just ordered a kit for my wifes car.