I lost a couple days trying to overcome a bad polish contamination on this piano. I noticed it when stripping and sanding. I eventually had to use shellac to block out the polish someone used to polish this piano. Whomever refinished this piano previously had the same issue but didn’t address it so the finish had fisheye craters all over it (sorry I didn’t take pictures, see below for a pic of fisheye on an oak piece). However when I finish this it will not have these craters.