I just rubbed wax from an ordinary toilet bowl ring into the woods of a No1 rifle I just restored. Seen it done elsewhere and along with a couple of good doses of flax seed oil, sunlight and turpentine it worked like a charm.
That barbaric thick gooey yellow wax brought it around very well for for what I wanted to achieve after scraping the stock to iron it out some. It's like a hundred years of dirty wax build up in a very short time, glad I found out about it.
This was, however on a rifle that's been around some. A really nice piece of wood probably wouldn't be subjected to such a desperate measure unless it was broken or needed some patch work and blending.