A concrete pool deck may have been painted to change the look of the concrete or paint may have been spilled on the concrete while painting an adjacent surface such as a house, pool house or shed. When large areas of paint are removed from concrete using strong chemicals, use run-off dams to prevent the run-off from entering the storm system. Check with your local township office for regulations in your area. However, small areas of spilled paint do not pose an environmental hazard and can be removed without such methods.
Remove everything from the concrete pool deck such as furniture, toys and pool supplies.
Attach a 15-degree stripping nozzle to a pressure washer.
Spray a section of the paint with the pressure washer. If the paint lifts off the concrete, continue cleaning the paint off the concrete pool deck without the use of chemicals to soften the paint. Position the nozzle so the spray from the pressure washer and the removed paint flow away from the pool water.
Use a chemical to soften the paint if the water pressure from the pressure washer does not remove the paint. Start with the least harmful chemical possible to soften the paint for removal. A citrus-based solvent is least harmful to the environment and surrounding vegetation. Saturate the paint with the citrus-based solvent. Apply in sections if the area is large.
Allow the citrus solvent to soften paint for the time recommended on the label by the manufacturer.
Point the nozzle of the pressure washer so the paint and citrus solvent flow away from the pool. Spray the paint off in sections.
Use methylene chloride or potassium hydroxide to soften the paint if needed.
Position a containment dam at a downhill location to contain the run-off and removed paint.
Neutralize the chosen acid with an acid neutralizer according to package directions.
Collect and dispose of waste according to local regulations.