I just came back from the antique store and found a red imp. It has some rust on half the blade and the scales are kinda warped. I am not worried about the scales or rust, I think I can fix both of those. The main thing I am worried about is the bluing on the tang. Will the tumbler remove it or do I need to cover it before I throw it in. Sorry there are no pictures, the soonest I could post some would be in a week. Thank you for your help