I had mine done by the Ceramic Coat Australia which is at Richmond. I think it was about $250 for my stock RB25 Manifold to be done in black inside and out.
Daikoku Futo!!!!
Here is a Picture of a Mini for Mr T
Oh, and for pure awesomeness, a Picture of Smokey Nagata with his R35 GTR and Scott Andrew from Red Bus Racing.
Had some +46 the other week, was really surprised by it, was very nice. I also saw the new bulmers a few weeks ago, haven't got round to trying it yet.