Can I rough sand a deck before rain, and finish sand after rain dries?
I've done deck railings and have split the sandings with rainfall in between with no problem. You just have to make sure the wood's dry before the second pass. Weather never cooperates when trying to sand/stain a deck. Get a waterproof tarp and keep the deck covered while you're working on it. It will save you a lot of time waiting for it to dry out after rain. Just make sure to allow for air flow. I always have a tarp handy when sealing decks.... you can't rely on the weatherman. Good luck.