Things You Will Need
With a little drywall joint compound and drywall tape, you can make your walls look almost like new again.
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Clean the wall with soap and water to remove any grease, oil or other residue on the paint.
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Apply a thin coat of drywall joint compound over the uneven area with a 3-inch taping knife. Allow it to fully dry and sand lightly.
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Go over the same area again with another layer of joint compound using your 6-inch taping knife. Once again, allow it to dry fully and sand the wall lightly.
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Apply a third and final coat of joint compound using your 8-inch taping knife. By now, the joint compound should be slightly elevated over your surrounding wall surface.
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Sand down the joint compound until your wall is perfectly smooth and level.
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Prime and paint the patched area to match your existing wall.