I found this place. http://hpcoatings.com/contact_us.htm This coating seems to also be a thermal barrier. The price is great if it stays on.
How good is powder coating? Will it burn off? I have a powder coater about a mile from my house.
When I painted my exhaust manifols last time, I bead blasted them perfect, then used that high temp paint from Eastwood. I burned off in about 100 miles. My manifolds are a nice rust color just like they were before I started.