I recently acquired a #5 Stanley plane and am in the process of cleaning it up. It is a well-worn plane and the shoe is scratched up quite a bit. Is there any down side to smoothing it down on my table sander? It's condition is such that it would have no real value as a collector's item, but I think that It has fine promise as a "daily driver" after some sharpening and tune-up. Additionally, the former owner sprayed the frame a billious purple. I guess to help identify it as his. Will anything which removes the spray paint also remove the japanning? To re-word my question, is there anything which will remove the spray paint which will not also remove the original japan finish?