How to Repair Plaster Chips on Corners, Edges and Walls

• 1). Spread your drop cloth beneath the chip. Use a putty knife or utility knife to gently scrape away any loose plaster around the chipped part, and then wipe the area down with a damp sponge.
  
  
• 2). Spread the joint compound into the chip with a putty knife until it is level with the wall surface. Feather the edges so that the patch blends in with the rest of the wall. On a corner, make sure you feather out to both sides.
  
  
• 3). Let the joint compound dry completely, according to the manufacturer's guidelines.
  
  
• 4). Sand the dry compound with 120-grit sandpaper until it is smooth and flush with the surrounding wall. Wipe the dust away with a slightly damp sponge.
  
  
• 5). Prime the patch and the wall around it. Let the primer dry and then paint it to match the rest of the wall. If you have dark paint, it may take more than one coat.