If you have a small area to treat start with soap and water tsp paint thinner or paint stripper.
Removing spray paint from concrete wall.
So if you do not want to harm the concrete and want to adopt a safer method of removing the spray paint then using a soy based gel is the better choice.
Chemical strippers might end up adding pits to the concrete or it may develop blotches on the surface from which the spray paint was removed.
Removing spray paint from concrete.
Connect its high pressure hose to the high pressure inlet on the washer.
There are several ways to remove spray paint from concrete including simple solutions that only require some soap and a scrub brush and more extensive techniques that require a sandblaster pressure washer or chemical stripper.
Spray paint on a concrete surface either in the form of unwanted drift from a project or faded lines or designs that were once desired is unsightly and often.
Using a chemical stripper.
The easiest method for how to remove spray paint stains of any size from outdoor concrete is to rent a pressure washer.