The procedure for stripping cinder block and masonry walls is virtually the same as that for stripping paint from any material at the beginning of the job but because cinder block is so porous the end of the job the part where you remove the paint residue can be difficult.
How do you remove paint from concrete block walls.
To remove paint from concrete first sweep the concrete to clean the area you ll be working on.
Use a paint scraper to scrape up any thick globs of paint that are sticking up off of the concrete.
Basement walls present a challenge because the cement walls are porous and this makes paint removal difficult.
Prepare a solution of soap and water or better yet diluted trisodium.
You may think that once you paint a concrete wall the paint can never be removed again.
Fortunately this is not the case since there are several cheap ways of removing paint from concrete walls this allows room for renovation since you may decide to change the color of a particular room or to simply remove the paint and leave the room as it is.
When you set out to remove paint from concrete the first thing to do is clean the surface of the concrete thoroughly.
Then put on a dust mask gloves and protective eyewear.
Apply an even coat with a wide paintbrush.
Allow it to dry for four hours or for the time indicated on the sealer label.
This is one option.
Removing old paint off basement walls is a time consuming effort.
After you had the mold eradicated if you intend to go back and re paint the concrete use latex paint as it breathes or is porous and allows moisture to evaporate on through rather than try and seal moisture out as i would think moisture gathered would lead to mold as well as what marksr said 6th post after yours that it s apt to fail.