Thanks for taking the time to respond. I did manage to find someone who used standard powder coat and had no problems at HPDE events. I'll give the powder coat a go this next week.
I've never measured the temp of the calipers but I can say that track pads get as hot as 1200F to 1400F under continued heavy braking on the track. How much heat that's transferred to the caliper depends on how long your session, ambient temp, thickness of brake pad compound...etc. Lot's of variables.
You can't go wrong with a high-temp epoxy paint like G2 caliper paint. It's more expensive than super dooper Duplicolor, but it won't flake off if you do it right. Even this will eventual get a little brown. I can't speak for power coating and its durability in high endurance track driving, but I would bet even that would get a little brown too if you plan on painting in a bright color.
My MINI is Horizon Blue. I was thinking yellow calipers, but black is still a possibility. I have stayed away from bright colors with my numerous mods with the idea that people who know will spot the mods without the presence bling. I was going to step outside that box with my brake upgrade. I hate it when I get indecisive. I really do value the opinions and perspectives offered up.
One man's "typical" is another man's "OOOOOOOHHHHHHMMMMMYYYYYYY....."
There are a ton of variables here.... pads, rotors, braking style, track speed, driver experience level, and more... many of which can have a significant bearing on how hot stuff gets and how long it stays that way.
In my experience, even "high temp caliper paint" doesn't really last through many hours of track use, with the way I abuse my brakes and the pad compounds I use. But I've never bothered to powder coat to have experience with that... so YMMV.
Yellow will be really hard to keep clean. Street pad dust should clean off pretty easily if you get to it fast enough, but track pad dust is like Krazy Glue.
The project is done. Went yellow with the calipers knowing I could go black if it doesn't work out. G2 paint is pretty good stuff and if you get prepared before beginning it is a piece of cake to do. I got four coats on everything that shows, also filed the various ridges smooth. The shop I worked with let me leave the car late on a Friday and I returned first thing Monday...on my way in no time. The rotors are stop tech, the EBC reds/SS Lines and brake fluid I got from Way. I added a few pictures to my garage if you are interested..
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