Step 8: Smooth the Joints

use your finger to smooth out the seams where the molding meets the wall and the ceiling
Photo: Kolin Smith
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Cleanup will be easier if you clear away excess joint compound while it's still wet.

Use your finger to smooth out the seams where the molding meets the wall and the ceiling. Use a wet sponge to help wipe away the compound and clean up the face of the molding. Don't remove too much compound—if you do, the seams will "hollow" as it dries.
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    Tools List

    • miterbox with saw
      Miter box with hand saw
    • putty knife
      6-inch and 1½-inch putty knives
    • rasp
      rasp or sanding block
    • hammer
      hammer
    • grout sponge
      sponge
    • angled sash paintbrush

    Shopping List

    1. Plaster-coated Foam Molding
    Get 10 percent more than you think you'll need, to accommodate offcut.

    2. Joint Compound
    Lightweight, easy-sanding premixed compound is best. A 1-gallon container will cover about 60 feet of molding.

    3. 8d Finishing Nails
    To support long runs of larger molding profiles as the compound dries. 4. 150-grit Sandpaper

    5. Painter's Tape

    6. Primer and Paint