We are building a 2nd floor addition and added a front porch as part of the project. The cedar was on site for a couple of weeks before the porch got built and as a result got a bit beat-up, not too bad, but some water stains from rain, muddy foot prints etc. Do I need to sand? Do I wait before finishing? There still is a good amount of activity as mechanicals are wrapping up and dry wall soon to begin. In the interim, I put plywood down over the steps and on the deck.