I got my headers back from Swaintech coatings yesterday. I went with their "White Lightning" as it's advertised to be most effective in heat retention. It looks better than I was lead to believe it would as their sale force described it as a functional, but not an aesthetic coating. I like it. It's coarse, almost looks metallic, and I took a close up with a dime for a scale comparison. It does appear to mar easily. I haven't decided yet if I'll leave it like this of paint over it with white header paint.
I've had regular ceramic coating done before, and wasn't that impressed with it. I can't say how much temperature it actually reduces, despite them claiming to have coated both inside and out, but it is easy to chip and super thin. This one appears to be thicker and I'm looking forward to seeing how it performs.