One of the early shops I worked in while still in school had the job of wheel maintenance for a local foundry (Tyler Pipe) where they have many local rail units transporting iron all around the place. I have turned/reclaimed a few of those wheels. It takes patience when your speed is limited to 1-3 RPM, but it's not a bad gig. Sometimes we repaired the bore as well, by metalizing, bushing/sleeving, or welding and re-boring. Lots of big hot chips.