Header shipping paint removal??

j par said
In the past I just ran them with the shipping paint.. or bought ceramic coated headers.. currently I got a brand new set of hedman headers off of Craigslist for dirt cheap that someone didn't use on their project.. I put a little test spot of paint remover stripper and it didn't seem to work very well?.. just wanted to hear what work for other people??..
Thank you..

Aircraft paint remover, Kleen Strip brand. It ain’t cheap but it works. Can’t remember what I used it on, I only remember it was pricey and that I was impressed by how good it worked. It’s been quite a few years since I last used it, that much I do remember!