I've been looking for that effect or black chrome to coat my headlight ring. I have not found any place close.
Isn't your headring already chromed to begin with. You should be able to hit it with a black chrome PC and come out nice. I dont really know how it looks first hand. Airborne would be the first one. I have a soda blaster in case it comes out messed up. ill strip it and the chrome will fine.
after looking at
www.thepowderpro.com i dont feel to bad about having a bit of a dirty edge on my PC parts!