How can spray paint and wall paint be removed from a large surface area of cement if pressure wash and graffiti remover did not work?

Answer

Slop on some paint remover. Make sure the concrete is completely dry first so that the paint remover can have some time to work before getting wet. Let it sit for the recommended time then use the spray washer again.

Answer

Another option is sandblasting which is the method used in most municipalities to remove graffiti from bridges, buildings and so forth.

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