If you had access to an edgesander, such as you would find in a cabinet/wood shop, you could use that. I would not use a beltsander, because control can be an issue. I've done it, but things can get dangerous real fast, the stock can start vibrating and then break (at the wrist)(don't ask how I know). If done either of these ways, it's just to get it down to size, rest would need to be done by hand. As in previous post, refinishing will likely need to be done.