Erase A Hole. Erase-A-Hole allows you to patch holes in drywall, plaster, and wood in two easy steps. Rub the special applicator across the hole in a circular motion until it is filled and then wipe off the excess. The patch dries without shrinking to an even, unnoticeable finish.
You've picked your color, but how many gallons will you need for your room? Calculate the wall area of the room; you'll need one gallon for 450 square feet. To determine the wall area, multiply the height of each wall by its width (don't subtract for doors and windows unless they take up more than half the wall); total the figures for the walls. Add 10 percent for future touch-ups. For two coats, double the number.