Drywall Imperfections After Priming . No running back to refill banjo/bazooka/box. Direct a fan towards the drywall to let the water evaporate completely. Best Primer to Cover Drywall Imperfections Smart Yard Guide from smartyardguide.com Once it settles, the drywall will be good to go for. Zinsser 60004 peel stop bonding primer white zinsser. You can only start painting once the wall is completely dry.