Of course it's possible to repair. It's a matter of building the sanded area back up to above flush with finish and then block sanding it down to match the level of the surrounding finished stock so that you end up flush with 1500-200 grit paper. Then you polish it with automotive polishing compound until it matches the original finish for gloss. It is tedious but a careful workman can make an invisible repair given enough time and technique.
RAN
