We too have become fans of the rough-sawn look, but the long time that it took to build the frame means that the timbers at one end are grey while those at the other end are still the rosy-brown of douglas fir. I'll look into wheel sanders, and once the frame is fully enclosed for good, we'll take a look and decide if we actually want to clean it up. I'm basically just looking into our options should we decide to go that way.