If paint comes off on the rag the old paint is latex.
Sanding paint off concrete wall.
When you set out to remove paint from concrete the first.
After the first pass go over the floor with a fine or superfine sandpaper disc to finish the surface.
Hardened residue may require a scraper.
Clean the concrete surface thoroughly and let dry.
Sand off any splatter residue lumps or uneven areas on the concrete floor.
Then wipe the wall with a soft cloth to remove any loose paint or dirt before starting.
Peel the membrane if you used one and scrape off the paint using a paint scraper.
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.
The most common way to remove paint is by scraping it off and the same is true for concrete walls.
Collect the paint residue and put it in contractor bags for disposal.
Press the grinder.
Repeat sanding as necessary until the sanding is complete.
Clean a small area of the wall with warm water and detergent.
The best concrete paint results come from careful preparation and concrete repair followed by application.
Use a degreasing cleaner and a scrub brush with water to remove any dirt and grease from the concrete floor.
Remove the soap residue by rinsing the walls with a sponge and.
In this video i use an angle grinder with a diamond wheel and dust collection to remove old floor paint from a concrete porch.
Attach a diamond sanding pad to a hand held grinder.
Wash the walls with dishwashing soap and water.
Coarse sandpaper would also be useful if you wanted to take the paint off only a doorframe or trim and leave the walls covered.
How to sand concrete walls step 1.
Scrub mortar joints and stubborn paint patches with a wire brush.
Dry the area with a towel.
Examine the concrete floor to ensure you have removed any paints stains or other coatings.
If some of the paint has already begun to chip or peel.
How to remove paint from concrete step 1.
A diamond pad is the only type strong enough to cut through.
Be cautious when using course grit sandpaper because it can seriously damage the underlying surface and create large score marks in the softer materials such as wood if you end up using the sander exercise caution follow the product instructions and wear protective gear.
Scuff sanding is also the first step in preparing newly cured concrete for painting.
Scrape peeled or chipped areas and apply paint stripper.
Dip a rag in alcohol and rub over the area.