Steps:
- Use a stiff-blade putty knife to scrape off peeling paint and old joint compound.
- Scrub the walls clean of all wallpaper-glue residue using wallpaper stripper solution and a coarse scouring pad.
- Spot prime the area with an oil-based primer.
- Once the primer is dry, spread a thin layer of joint compound over the area.
- When the joint compound is dry, sand the area smooth with 100-grit abrasive paper, then prime again with oil-based primer.
- Apply two paint topcoats; use mildew-resistant paint in bathrooms and kitchens.