I have some "super duper special paint" that holds up to the temps pretty well. I tried a ton of different paints and this one is not a regular paint, more of a powder coat, but a cold process. I tested it on my exhaust manifold. It doesn't stay totally black, but it's a dark grey and looks 10x better than a bare one. You can see mine if you are interested. No, I am not giving out the name either
It took way too much time to try and finally find it.
Threaded Mode