When I was a mere lad, my mom once took me to England where we visited a bunch of castles. All of the wood trim, and furniture was unfinished, hand rubbed, natural and many hundreds of years old. The only thing they ever used was bees wax softened with turpentine. I tried it once on my black lacquer grand piano, rubbing it in with 0000 steel wool. A lot of work, but man, what a shine.