Things You Will Need
-
Strip as much paint as possible from the concrete foundation using focused water pressure generated by the pressure washer. Wait three to four hours for the foundation to dry.
-
Scrape remaining paint from the foundation using a metallic putty knife.
-
Sand remaining stubborn bits of paint from the foundation using a power sander stocked with 80-grit sandpaper. Stop here if the foundation is free from paint.
-
Apply solvent to a 3-by-3-foot area of the concrete foundation, using a paintbrush specifically intended for use with oil paints.
-
Wait 60 seconds for the solvent to loosen the paint. Scrape the remaining paint from the area using the putty knife. Use a wire brush to remove paint from awkward, sunken areas within the foundation. Continue until you have stripped the foundation bare.