I have recently come into possession of an old display model from the 1920's. At some point in its history, the painted finish was covered in what looks like orange shellac. Problem is, a very poor job was done, and left incomplete at that. Parts of the painted surface were not covered; other areas have lots of hardened drips so it looks very unsightly. Anyone got any tips on removing the old shellac without attacking the paint? I have been told to try rubbing alcohol. Not sure whether the original paint was re-painted; could be. But I thought I'd like to try to go down one layer at a time, saving the paint if I can. If I fail, I can always sand and scrape, then re-paint again, but if I can save an original surface, I'd like to try that route first.