If I were going to attempt it, I'd go to the hardware store and buy a can of paint stripper, read the directions, and have at it. I've removed the finish from many firearms using stripper alone, and sometimes a fingernail brush. Once the finish is removed, the stock is flushed thoroughly with water, dried, and then allowed to sit for about a week to ensure there is no water left in the wood. I like Circa 1850 Tung Oil finish. It soaks deeply into the wood and builds slowly - one thin application per day until you have a build up. Then four ought steel wool down to wood again and repeat until you are pleased with the result. It's pretty water proof too.