Step 7: Sand the first coat

• Check that compound is uniformly white, which indicates that it is dry. (Wet areas appear darker.)
• Sand inside corners with corner sanding block.
• Sand all other surfaces using a pole sander with medium-grit abrasive. Apply gentle, even pressure. Sand only enough to smooth rough areas; don't sand down into paper tape.
• Feel for rough areas and sand as needed. TOH TIP: Don't try to sand out indentations or craters; these will be filled by subsequent coats of compound.
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    Tools List

    • drill
      for blending compound
    • drywall tape dispenser
      Drywall tape dispenser
    • swivel head pole sander
      Swivel-head pole sander with drywall sandpaper
      for smoothing first coat of compound
    • sanding block
      Sanding blocks
      for sanding corners
    • mud box
      Mud box
      for holding small batches of compound and cleaning knives
    • drywall knife
      5- and 10-inch drywall knives
    • mallet
    • drywall corner clincher tool
      Corner clincher
    • shop vacuum
      Shop vacuum

    Shopping List

    1. Medium-grit sanding screen or drywall sandpaper for smothing first coat of compound

    1. Fine-grit sandpaper for smoothing second and third coats of compound

    2. Joint compound

    3. Paper tape