Clear out loose debris from any cracks or holes in the surface and repair with cement or filler such as latex masonry caulk.
Remove paint from concrete wall.
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.
Paint stains on concrete completely disappear using this method leaving you with a clean surface for repainting if necessary.
To get oil out of concrete or remove unsightly paint or other stains fill both buckets with hot or warm water and add several squirts of dish soap to one of the buckets.
Collect the paint residue and put it in contractor bags for disposal.
Clean a small area of the wall with warm water and detergent.
Scrub mortar joints and stubborn paint patches with a wire brush.
Use a broom or shop vacuum to remove all dirt or debris.
Here is another video of removing a paint using an chain paint remover and diamond hole drill.
Before moving on to the next step remove or cover any furniture near the wall.
If possible remove any loose paint from concrete with a scraper or brush.
Both methods create relatively less dust as grinder wire brush.
Then wipe the wall with a soft cloth to remove any loose paint or dirt before starting.
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.
2 apply a chemical paint stripper to the concrete surface.
Remove loose paint with a scraper wire brush and cleaning solution.
Dry the area with a towel.
If paint comes off on the rag the old paint is latex.
Sweep the area to clean away dirt and debris.
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.
Use the edge of a scraper to remove as much of the paint as possible.
Soda blasting is also an environmentally friendly way to remove paint from concrete and causes no damage to the underlying concrete.
Soda blasting is a great way to remove paint from large areas of concrete.