We recently painted our house but managed to get quite a few paint stains on the wooden floors. Nail varnish remover seemed to get it off without doing any harm but I need more for several rooms. Went down to hardware shop but couldn't figure out what the industrial equivalent is, couldn't find anything containing acetone. Any suggestions how to get the paint off? I don't know what the finish is on the floor but it's not wax. Probably polyurethane.