cleaning out my mom's basement from water damage from too much rain this summer. finally got to corner of basement where my dad kept all his tools etc. found this back in the corner, on the floor, under a bunch of stuff. it is a mess! no motor so guess treadle - which i also found the treadle wheel. stand for it has been out in yard for years - my mom had at one time had him put a board on top to make a patio table. orig top is long gone. any suggestions on how to clean this without damaging decal etc?