duplicolor has a high temp paint with ceramic in it.
works well, bakes on good with exhaust temp.
I used this for my headlight ring. It is very durable. I am temped to try it on my exhaust but I do not have an oven big enough to bake it afterwards. I worry about scratching it while putting it back on to "bake" it by running the bike.
Then again might be worth the shot, if it doesn't work then just get them powdercoated.