Can this be done without sanding to bare wood? I have no idea what the finish on the floor is, maybe varnish, maybe wax, maybe shellac. How can I tell for sure? And if it is shellac, with poly stick to it? I know if its wax the wax has to go, but can it be simply stripped off with ammonia or will it require sanding to bare wood?
If a complete sanding is necessary then either the carpet will stay or I will live with the holes left in the floor! I've done a total sand/refinish once, I'm not going through that again! I have another room that needs the carpet removed and floor refinished but that one definitely needs the full sanding so maybe I will have both done professionally at some point in the future.