The most common way to remove paint is by scraping it off and the same is true for concrete walls.
How do you remove paint from concrete block wall.
Before starting lay a cloth on the floor beneath the area you will be working on so that the flaking paint can be easily removed later on.
A stream of water at 4 000 to 5 000 pounds per square inch is suitable though it is important that you.
Then wipe the wall with a soft cloth to remove any loose paint or dirt before starting.
If you applied a membrane much of the paint will come off when you remove it but you ll still have to scrape and scrub.
Peel the membrane if you used one and scrape off the paint using a paint scraper.
Use a broom or shop vacuum to remove all dirt or debris.
If possible remove any loose paint from concrete with a scraper or brush.
Pressure washing is the easiest option for removing paint from outdoor concrete surfaces.
2 apply a chemical paint stripper to the concrete surface.
Prepare a solution of soap and water or better yet diluted trisodium.