From 1975 - 1985 I built furniture of this style. Our furniture was made out of White Pine, but most any pine will work. Hardwoods won't get the same affect. Once we got the furniture pieces built, we used an acetylene cutting torch with the oxygen lever pulled to "spray fire" the surface. By this I mean holding the torch about 1 - 2" from the wood and moving it like a paint spraying gun, back and forth over the surface. The flame is so hot that the wood bursts into flame as the torch passes, then instantly goes out, leaving the surface black with soot. We had a pneumatic die grinder with a home made shaft attached that held about 8 3M scouring pads. All the soot was buffed off, going with the grain, with this grinder. In the corners and odd areas we used the pads by hand. After buffing the furniture looked sand blasted with the soft grain recessed and an umber color. The hard grain was pronounced and a lighter color. Then we sprayed coats of lacquer on the furniture. It turned a beautiful color that cannot be reproduced with stain.