Zinsser BIN primer-sealer brags that there is no need to sand. BIN is a shellac formula which means it is alcohol-based. But once the alcohol evaporates from the primer, in about 45 minutes, the shellac finish is fully cured. Most water-based primers take a full 7 days to cure! And you can use any paint over the top of BIN. I always use a water-based latex. However, I always wait one week before I put anything on top of painted furniture. Water-based paint takes 21 days to fully cure?