Yes, white spirit can be used to remove paint from concrete surfaces, such as floors and walls. Most paint brands manufacture their own paint removal product, so if white spirit doesn’t do the trick, you should check with your paint brand. Depending on the paint type, it can be either based on oil or water, there are dedicated paint removers for it. If you are not sure what type of paint it is, use a remover that is dedicated to oil-based painting.
Apply the white spirit generously over the concrete surface and leave it to sit for a few hours. If the area is particularly soiled, consider leaving the white spirit to soak into the paint overnight. Don’t leave it to sit for any longer than 8 hours. After this, you’ll need to scrub the affected area with a wire brush. You can also use a scraper tool to remove any peeling residual paint. You’ll need to rinse the area thoroughly with a hose or a pressure washer. Let it dry completely and assess whether or not it will need to be treated for a second time.