Things You'll Need

Instructions

1

Put on your goggles and nose and mouth mask. Run the electric sander along the surface area of the cracked paint. You might need to use a step stool or ladder if you're dealing with higher sections of a wall.
2

Brush down the entire surface area of the space after you've sanded it. It's important that you thoroughly brush away all the dust. Apply a single coat of high-grade undercoat with a roller or paintbrush. Allow the undercoat to dry completely according to the manufacturer's instructions. If you're not sure of the timing, just give the undercoat 24 hours to dry.
3

Apply a single coat of the paint of your choice with a roller or paintbrush. Make clean, uniform strokes when applying the paint.