Put on a dust mask to avoid inhaling small particles.
Chip off large chunks of spackling with a small metal putty knife. Scrape the blade of the knife gently against any ridges to remove them.
Sand the remaining spackling in a circular motion with a piece of 120- or 150-grit sandpaper. Use a hand sander to make the job go faster.
Wipe the wall with a damp sponge to remove leftover dust. Sweep up any dust on the floor with a broom.
Prime the spot where the spackling was with latex primer before painting over it. Paint the primer onto the spot with a bristle or sponge brush.
No