The upstairs floors have been sanded and refinished. They turned out so pretty. Chad, our contractor, told me they would be beautiful and had very specific ideas about how they should be finished...."Clear with three coats of semi-gloss polyurethane". I have to say, I cringed at the thought that the floors would turn out too light without stain. But, as usual, Chad knew what he was talking about. As soon as the floor sander made it's first pass I could see what he meant. The wood is yellow heart pine and is cut on the vertical.....I think I'm saying that right. In any case. The wood grain and natural color is gorgeous and unlike anything I have ever seen. Thanks Chad!