Powder coating and carbon don't mix sadly.Not totally sure about painting carbon, but I know of custom bike builders in the Philly area using both locations for powder coating.
In South Jersey: http://newagepowder.com/
In PA, just outside NE Philly: http://boneheadperformance.com/
Powder coating and carbon don't mix sadly
I wonder how many times that's happened lolEspecially the process of putting it in the oven.