 If you want to use a little mouse sander, you know, a little square one for an area here and an area there, fine. But also be mindful, if you use a sander on a pressure-treated wood deck, that pressure treatment is not that deep into the wood. Not that you're going to sand off a quarter of an inch, but some of the new pressure-treated wood, I'm telling you, it's just not that deep into the wood. Maybe 3-16ths, maybe less.