I found a nice scrap of curly maple, which I used to make the base plug and stopper. The "flame" was so pronounced that I decided to leave it natural - just a friction polish. Goes well with the horn color, I think.
Bubba: Friction polish is about the simplest way to finish turned wood. It's a combination of shellac and wax and is available at places like Woodcraft.
It's applied after the wood has been sanded and polished (I use a scotchbrite pad). A little is rubbed on, then the lathe is turned on and the piece is polished with a rag . The heat sets the finish and results in a high gloss that doesn't look applied. Only one coat is needed and, if too much is applied it gets a little gummy.
It'll work on flat surfaces with some hard rubbing but is best for turned objects.