I told my mom I would make some shelves downstairs in the laundry room for old records, photo albums, games, etc. So we dont have to keep them in boxes. The shelves dont have to be anything fancy-but I don't want them to be an eyesore. I was thinking using those "L" shelving brackets and a few sheets of 16" wide wood screwed to it. How thick should it be? I don't exactly want to use plywood for it because it has the unfinished edge. I'm sure there must be some kind of wood that has the top, bottom, and sides "finished" so it looks neat and tidy. suggestions?