We were watching a past show of Bob's Malibu project when he demonstrated a technique for a floor where you cut off the ends of 2x4's and glued them down to the floor then grout with a mixture of sawdust and varnish. We caught just the end of this techinque and it looked like the floor was finished with an application of some type of oil stain. It was a beautiful application and of considerable interest to us. Could anyone out there provide the details, and how-to for this particular flooring project?