I have an oak floor that was installed in 1962, and carpeted over sometime
later, probably in the mid 70's. It appears to be in pretty good shape under
the carpet, aside from holes from staples and tack strips. I would like to fill
in the holes and apply an oil based polyurethane.
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.