There's high heat powder coat & regular.......check into it first......
Very interested here also....I've had that very can of Argentflame (his real name's Alvin) fill in my hand several times & did not buy.....
My brother told me a tale of automotive people saying that it will expand under heat at a different rate than the original metal & possibly fail.....
Personally, I think it will be fine, esp. after it's coated over with the finish material & contained, if you will.....