Options for Removing Paint From Concrete

Power Washing

• Using nothing but water and a lot of pressure, a power washer can remove paint from concrete without damaging the surface. Power washing works best on older, chipped paint on a solid surface such as a wall or floor. Although this method is relatively simple and entirely chemical- and dust-free, it takes practice and isn't appropriate for indoor paint removal. You can rent a power washer at most home and garden centers.

Sandblasting

• Sandblasting is similar to power washing, but instead of using just water, both water and fine sand are blasted onto the concrete, removing paint -- and anything else -- on the surface. Sandblasting is commonly used to remove spray paint from outdoor walls and can remove even tough epoxy paint. It's effective because it also cuts away a thin layer of the concrete itself, so it's not appropriate for detailed moldings. Sandblasting takes a lot of practice and equipment is expensive, but it is a good choice for large outdoor jobs.

Grinding and Sanding

• Grinding is the preferred method for removing paint from concrete floors, especially indoors. A floor grinder strips away unwanted paint, leaving clean, unfinished concrete. You can also use a belt sander to remove paint from concrete floors and walls. You can sand indoors, but it's important that you do not breathe the paint and concrete dust -- invest in a ventilator, not just a dust mask, for sanding concrete. You can rent floor grinders from some home and garden centers.

Chemical Stripping

• Chemical stripping removes paint from any kind of concrete surface without damaging the surface, making it a good choice for moldings and sculptures. The method involves coating the paint with paint stripper, allowing it to sit until the paint buckles, and scraping. Although it's fairly simple and can be done indoors, there are hazards, especially concerning the toxicity of some strippers. Opt for "green" strippers, which are less toxic and protect your skin, and wear a respirator.