I remember a while back there was an article in the magazine about restoring pie irons. I looked through the issues I still have and can't find it. Do you have a copy of that article. A back issue, pdf anything may help. I picked up some pie irons recently and half of them really need some work.
I think I remember that article, but I can't remember what issue it was in. I will try and look over the weekend. I also saw a YouTube video the other day. I didn't click on it but it looked like it had to do with restoring cast iron. I doubt I would find it again but I will bet there is other similar content if you search.