Here's a local coater worth checking out.
http://www.newimagecoatings.com/
http://www.corvetteforum.com/forums/...post1591794688
He did a set of C7 long tube headers for only $225. This is the same coating I used on my Evo X downpipe and exhaust manifold. I would not recommend it for a turbo manifold or housing, but it is very durable on N/A and supercharged headers, and turbo o2 housings, downpipes, etc.