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.
How to clean paint off concrete walls.
Spread a thick layer of paint stripper over the paint with a cheap paintbrush.
Scrub mortar joints and stubborn paint patches with a wire brush.
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.
If paint comes off on the rag the old paint is latex.
Peel the membrane if you used one and scrape off the paint using a paint scraper.
The most common way to remove paint is by scraping it off and the same is true for concrete walls.
Then wipe the wall with a soft cloth to remove any loose paint or dirt before starting.
Sweep the area to clean away dirt and debris.
Dip a rag in alcohol and rub over the area.
Use a paint scraper to scrape up any thick globs of paint that are sticking up off of the concrete.
How to remove paint from concrete without chemicals.
This information is needed to decide what kind of paint stripper to apply.
Dip a sponge in the water and wring it out completely to avoid leaving streaks.
Use a contractor s broom to sweep away any loose debris and dirt.
Dry the area with a towel.
Clean a small area of the wall with warm water and detergent.
Then use mild soap and water solution to scrub away any remaining soil.
Step by step tutorial paint stripper method step 1.
When you set out to remove paint from concrete the first thing to do is clean the surface of the concrete thoroughly.
To remove paint from concrete first sweep the concrete to clean the area you ll be working on.
If no paint or a very little amount comes off on the rag then it is oil based paint.
Paint stains on concrete completely disappear using this method leaving you with a clean surface for repainting if necessary.
Clean the concrete surface and allow it to dry.
Prepare a solution of soap and water or better yet diluted trisodium.
In my garage i had painted walls that were pealing in areas.
Collect the paint residue and put it in contractor bags for disposal.
Rather than just scrape the paint with a putty knife to remove the loose paint before i applied.
Rub that sponge vertically down the wall working one section at a time.
To clean walls that are painted with flat paint mix a few drops of dish detergent with a half gallon of water.
Soda blasting is a great way to remove paint from large areas of concrete.
Use the edge of a scraper to remove as much of the paint as possible.