I have an old rectangle small table, aged around 1920, with the chess inset squares. I sent just the top part to have a few repairs done, which were OK, but as well as the repairs the top has been painted over in Shellac which I don't like and I don't think represents that era. I was hoping to use a light stain. Can anyone advise how to get rid of this Shellac without damaging the woodwork? Thank you for any help.