It seems that the amount of finish required cover a stock is about a quarter of a 4 oz. can (or less). In the past, I've tried to preserve the remainder by decanting, sealing the lid with plastic wrap, etc. But when it's time to use the finish, months later, the stock finish that remained in the can has hardened and is pretty much useless. Any one have a solution to this?... (I haven't tried storing the can upside down)