it all stinks and smokes when you first fire it up and then whatever stays on is good to go for a season--just make sure all oil etc is off--clean em good--it will spray right over any minor rust and turn out OK--blasting beforehand defeats the cheapo part IMO--and the stuff still is just so so
I plan on doing a set of dragster headers next week--coating just too high for cheapo headers--ok for high $$ headers IMO