Powdercoat prep?

[ctx97]

Screw the ceramic coatings, I have had and my buddy has severral sets of coated headers and the stuff turns colors, and also doesnt last like it should.
Find someone who can plasma spray aluminum on headers. A set of alumacoat headers I sold 15-18 yrs ago still look awesome, squirt them with some good carb or brake cleaners and tada look like new even when soaked in oil gets burnt.
I am not sold on ceramic haeders anymore unless they get a thermal barrier coating inside, then it might last, but they still discolor like crazy.
Just my experience.

Who did the coatings? If they did as you say, they were not done properly. They have to coated inside, if not it pretty much defeats the purpose.