2torial #0658: Learn2 Patch a Hole (Continued) Method 1: Plaster Wall Apply the first coat of plaster Mix up enough pre-mix plaster to fill the hole. Transfer the mixture to the plywood, and pulverize any small unmixed lumps with the edge of the trowel. Transfer some of the mixture to the hawk, and hold it in one hand.   Place the hawk beneath the edge of the hole. Use the long edge of the trowel to gather some mixture, and press the edge of the trowel against the wall so that the mixture is caught between the trowel and the wall.   Bring the trowel upwards in a sweeping motion, so that the mixture is pressed into the hole. Make only one motion, rather than going back and forth.   Repeat until the metal lath has been covered, moving the hawk and trowel as needed.   Don't spread the mixture more than 1/2" thick. After a few minutes, add another layer, if need be, to bring the mixture to within 1/16" of the surrounding area. Remember, the finishing coat will bring the material flush with the surrounding area. Then: Take that piece of metal or plastic, and use it to level the mixture within the hole. Work left to right, and then up and down. Move the "smoother" tool slightly, from side to side, as you smooth the mixture. This will help prevent build-up on the tool.   When the plaster has set for several minutes, use the comb to create some texture to which the finishing coat can adhere. Note: If the hole is very small, you may need to use a smaller pointed trowel to keep the mixture from climbing the sides of the opening. Method 1 - Step 3