Get it done by Zircotec coatings in a Zirconia finish like the white manifold above.

http://www.zircotec.com/exhaust.html

This company does alot of F1 stuff and turnaround is a couple of days.

Its pricey but worth it.

I personally wouldn't touch camcoat with a barge pole as i've used it in the past and didn't do much apart from look pretty until it flaked off at high temps.