Two ways to go about it, Brownells sells the checkering sets if he wants to clean the checkering up himself, and refinishing is a breeze. If the stock's dinged up, and he decides to do it himself (worthwhile), he should strip it then should soak it before sanding and finishing. A soak will raise a lot of dents, then let it dry a week, 000 steel wool to remover burrs, then sand from 320 up to as high as 1500 if he so wishes. After that, few finishes are prettier than hand rubbed tung oil, in my opinion. I've done many many stocks this way always with amazing results.