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Sand Drywall Joints

2019-8-18do not sand between coats - if you do, use a well wrung sponge, to remove excess dust, before applying another coat of mud use the edge of a knifetrowel, to knock down any ridgesclumps, prior to additional coats of mudhen you are satisfied, that you have a reasonably uniform surface, begin blending in the edges, with 120 grit drywall.