I picked up this from O'reilly the other day. We'll just have to see how it holds up. I sprayed my manifold and the compressor housing on my hx35, after hitting them pretty thuroughly with a wire wheel on a grinder. It looks really nice right now but who know how it will hold up to the intense heat of a diesel.
I used High temp header paint on my manifold and the turbine housing of my big turbo and its holding up pretty good so far. Its been 7 months. Seems to work for a while. Good thing is you have left over paint to do it again the next time.