A long time ago in a place far far away as I was growing up I knew this man that would I think take a blow torch and use it to burn the wood then if I recall correctly wire brush the surface to get the really burned bits off. Bird houses/feeders/other outside things and they seem to have an interesting look and some form of protection from decay. He was from Germany and taught me many interesting things...... but one of them was not how he did this.
Does anyone here know anything about what I'm talking about???