Choosing a sandpaper with a grit value of120or 150 will provide a smoother finish and minimize the risk of scratching your drywall. ... Using joint compound to clean up grooves and gouges will prevent the risk of potentially over-sanding the affected areas. What is a 220-grit sandpaper norm...
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can be applied to either bare or painted drywall as long as the surface is blemish-free. To prepare the surface, don protective gloves and goggles andapply the spackling compoundto divots or cracks. Dry the compound according to the package instructions, then sand with fine-grit sandpaper. ...