I had mine dine by http://www.performancecoatings.com/performancecoatings.html

you can see a picture at http://community.webshots.com/photo/483943098/490069089gFXbnk

I think it is better than jet hot.... Have not run engine but an hour or two so far. I also had my turbo coated the same, the color is "Satin Gray Ice". more pictures if you follow the link below and look at the Detroit album.
Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-