Although this is a bit late to help your on going problem. I thought I'd chime in. I had my headers Titanium coated at a powder coating shop. I've run the dog poo poo out of them. Six, seven years old now. Still look great! They started out a little lighter than they are now, but it only looks better now. They look a bit dull in this pic. But they show fantastic! This was when I was removing my motor to prep the engine bay for painting.