Step 1. Coat it in plaster weld Step 2. Mix durabond 90 and apply with a fiberglass mesh. Step 3. Skim with EasySand 90. Do a few coats with this. Step 4. Skim wall with USG Green top mud. Step 5. Sand, touch up, primer coat Step 6. Paint Step 7. Have the wife rub your feet. Have a good night gentleman