1. Keep walls clean and dry.
2. Apply tape to the cracks and press firmly.
3. Make sure the gap is covered with tape, then use a knife to cut off the excess tape, and finally apply mortar.
4. Allow to dry, then lightly sand with a construction round hammer.
5. Fill in enough paint to make the wall surface smooth.
6. Cut off any leaking tape. Then, note that all cracks have been properly repaired, and use a fine composite material to modify the surrounding areas to make them smooth and new.
