1. Clean the wall: clean the wall with detergent and water to remove dust and dirt. 2. Sanding the wall surface: Sanding the wall surface with sandpaper or sander, so that the latex paint can be better attached. 3. Joint filling: Use joint filling agent to fill the cracks and depressions on the wall. 4. Brush primer: Brush the whole wall with primer to make latex paint better attached. 5. Brush latex paint: Brush the whole wall with latex paint, and pay attention to brush evenly to avoid dripping paint and missing brush. 6. Waiting for drying: It usually takes 24 hours for latex paint to dry. 7. Brush for the second time: If necessary, you can brush the latex paint for the second time to increase the luster and protection of the wall. 8. Cleaning tools: clean any latex paint residue around the painting tools and walls. The above is the simplest method to renovate the latex paint wall, but if more professional effects are needed, it is recommended to ask professionals to operate it.