How many of you have seen Winchester rifles all black around the action, with wood crumbling, split, chipped and missing. It's usually in the butt stock as most people squirt the action full of oil (exaggeration, sorry) then stand it up on the butt plate. The oil soaks into the walnut and over time, deteriorates it. I've seen the same phenomenon on muzzle loading guns too, with over oiling the lock.