trying to refinish the butcher block tops at work. they are used daily during the summer but winter time is slow. time to refresh the place. anyways the bench tops are maple block. a few deep gouges and stuff like that. the main thing i am worried about is getting all the old grime off. we sanded them down last year and put on some polyurethane but got some fish eye from the deep marks. just looking for tips on dealing with the fish eye and what finish would you use? we have belt sanders and a 1/4 sheet palm sander.