Funny you should ask that. I just did my exhaust pipes in high temp flat black. It is suppose to be good to 1200deg. Not sure how well it will stand the test of time but we will see. Ceramic is the best way to go for high heat applications however it is expensive. I should also have the right size tip for my spray gun to do ceramic by the end of the week. However I don't really want to get into doing long tubes till I get my big oven. Right now I can get a set in my small oven but I'm afraid I will compromise the finish trying to actually get them in there and hung. If you wanna try the high temp powder I would be willing to work with you on a good deal.

Here are my pipes