Step 11: Apply final coats for a smooth finish
Apply another coat of compound and smooth it across the entire face of the patch using an 8-inch finishing knife. Feather the edges about two inches beyond the seam coat. Allow the compound to dry for 24 hours and sand with a 120-grit sandpaper attached to a sanding block. Wipe the wall clean of dust and apply a final coat of compound mixed with a little water. Smooth the finish coat over the entire surface of the patch and feather it two inches beyond the edges of the previous coat. Sand lightly with 120-grit sandpaper for a smooth finish that is ready for priming and painting.
 Apply finish coats that feather two inches beyond the previous layer for smooth edges.
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