I've noticed that as soon as you put the mat down you can't see the wood grain to well. I put mat down on my false bottom and then cloth over and it blacked out the wood grain. I would say put a couple of layer of cloth and you should be good to go. I coated my whole floor with one big piece of cloth instead of a bunch of small pieces. It turned out pretty good. Heres an example of what it looks like. The dark spots are where the 3x3 pieces of mat are.
~Brian
http://i116.photobucket.com/albums/o...8679/001-5.jpg with cloth.
and without cloth.
http://i116.photobucket.com/albums/o...8679/001-4.jpg