Use the following steps and materials to patch up any hole that is ½ inch or any hole that is smaller than that size. Bigger gaps are a little more complicated and will nearly always require more work, including cutting a drywall patch to fit the hole. For this type of work, you may want to consider hiring a pro to do the job.
tack cloth (This is a sticky cloth that’s designed to pick up loose particles, like dust and lint; it’s sold at hardware stores.)
220-grit sandpaper and fine sanding block
paint (Use the same color as the paint that’s on the wall.)
small paint roller
What to Do
With the putty knife, lightly scrape around the hole to smooth out the wall’s surface. When the surface is even, wipe the wall and knife with the tack cloth until they are both clean.
Next, use the putty knife to spread Spackle over the hole. It is best to spread it in a crisscross pattern for the most even and smooth coverage. Make sure you give it enough time to dry—follow the package instructions closely.
Wrap the sandpaper around the block and then sand the patch’s surface until it is smooth. When that is complete, wipe it with the tack cloth until it is clean.
Paint the area with the roller, feathering the edges so that the patch blends in with the rest of the wall.