Spray paints are commercial products that are made to stick to almost any surface. They cling especially stubbornly on concrete surface. Accidental spray paint marks make floors, walls, driveways, paths look dirty and unattractive. Fortunately, there are some effective ways to remove the marks.
Use a garden hose and plastic brush: If the paint spray paint mark on the concrete floor or wall is still fresh, use a garden hose to wash it off. The hose must have a strong spray nozzle to produce enough force to wash off the paint. Use a plastic brush to scrub the remaining paint and then wash that off as well with the hose.
Paint thinner: Pour some paint thinner over the spray paint marks and let it dry for half an hour. This dissolves the spray paint. Use a hard brush to scrub off the paint and then wash away the residue with clean water.
Chemical strippers: Pour some chemical stripper on the paint mark. You can also apply it with a brush if you like. The stripper dissolves the spray paint and makes it easier to remove. Now scrape off the paint with a hard brush and wash it away with water. This method is especially useful for smooth concrete surfaces and difficult places such as cracks, crevices and holes.
Oven cleaner: The oven cleaner you probably have in your kitchen can also be used to remove spray paint quite effectively. Spray the cleaner on the paint mark and let is dry for 15 minutes. This dissolves the spray paint. Take a wire brush and scrub the mark off the concrete and then wash the residue away with water.
Gel paint remover: This is said to be the best spray paint remover. Take a soy based gel stripper and apply it liberally on the paint mark. Wait for 5 to 15 minutes for the gel to take effect. The gel hardens the paint and makes it like skin, which can be peeled off the concrete surface easily. This is a very neat way of removing spray paint from the floor and walls.
High pressure water: You can use a jet of water at a very high pressure to remove spray paint marks from a concrete surface. For effective result, you will need to set the power level to 4,000 pounds per square inch (PSI), secure the nozzle tightly and point the jet directly on the paint mark. This will effectively wash away the paint marks from cracks and crevices and you won’t have to get down on your knees either.
Blast the paint off: If spray paint marks are scattered all over the concrete floor, you can use an industrial sandblaster along with fine-grit sand to blast them off. This method is very effective for spray paints that are deeply embedded in cracks and crevices. This is the way they do it in construction sites.