Cut out bubbles with a utility knife and reset seams as needed. If any tape is loose, lift it and apply joint compound underneath, using a small wallboard knife, then press the tape flat. Sometimes there's no alternative to removing the damaged tape entirely and applying new tape. Apply t...
Remove dust from walls and wash over them with a rag dampened with a TSP and water mix. Scrap off loose paint and fill any holes with surfacing compound. For new drywall, apply wallboard sealer. For existing drywall, use a stain-blocking primer to help hide water stains. Apply two coats ...
lift it and apply joint compound underneath, using a small wallboard knife, then press the tape flat. Sometimes there's no alternative to removing the damaged tape entirely and applying new tape. Apply two of three coats of mud over the repair with a drywall knife, then prime and paint...