Big topic for anybody that's ever built anything with an exhaust system. Been through it all from highest cost professionally coated headers, to BBQ spray paint. I like Rustoleum BBQ spray paint on certain engines. It's cheap easy and can touch it up any time. I've just about given up on anything used on headers.
That said, I saw this pop up again today. I've seen it before but never gave it a second thought. Has anyone ever used this from Eastwood with any success? Headers or cast manifolds? Over $22 oz. !! Asking for a friend. No, really. I'm not going to be the guinea pig anymore.