Not caring for harsh chemicals myself, try sand paper or better yet if you have a belt sander. Use a heavier grit to scrape it out. As for the pores with paint left in......go to a home improvement store. They always have broken bags that have spilled onto the floor. Scoop a little up. At home mix with a little water (pancake batter thickness) and smear it into the pores of the wetted concrete, then wipe most of it off leaving only that which will stay in the pores. Do a larger area that the original paint stain to blend it in better.I need the best way to get dried paint (spray paint and regular paint) off of concrete!!?
You could try goof off not cheap though.
Peel Away generally does a good job on oil and latex, however, it may be too cold for you to use any type of stripper with any degree of success. Most strippers work best at 68 degrees and above, and some will not work at all during cold weather. If you want to try a stripper go with a paint and epoxy remover (BIX, JASCO, and others) and cover the wet stripper with plastic wrap, then on old towel for a blanket. Sandblasting works no matter what the temperature is. A hot Lye solution may work also, but you must be able to flood the work afterward with clean water.
3 qts. COLD water (never warm or hot) in a Stainless Steel Bucket or Crockery Pot (other containers will melt from the heat when Lye and water are mixed).
Using a Wooden stick add the Lye slowly while stirring constantly.
Remember: Lye is Vert Caustic, wear protection (including your eyes).
Apply with a fiber brush while hot.
Afterward neturalize with an acid (like pure vinegar).
Rinse well.
Brin
Here's what I found in a search:
Chemical paint strippers . . . The most effective products contain methylene chloride, but because of its environmental hazards, some hardware stores might not carry stripper that incorporate this chemical. I suggest that you visit your local industrial paint store (not hardware store) and see what they can offer you.
If none of the chemical strippers work, you will need to have someone come in with an abrasive blasting machine. This will remove the paint and clean up the concrete. To prevent dry dust from flying in all directions you might consider abrasive blasting in a water slurry. Alternatively, look into the use of high pressure water blasting. This is very effective, but it does dump lots and lots of water around the working area. Last, but not least, some contractors use high pressure water with baking soda as the abrasive.
I'd try paint stripper first to loosen the dried paint and scrape it off with a scraper and then using steel wool for the smaller particles, then if any was left in the cracks and crevices, I'd use a can of spray on goof off following the directions on the can. If there are many layers, you'll need to repeat the process several times, washing well in between using a very stiff bristle brush and hot soapy water will remove some as well and the stiff bristle brush will scrape the surface paint, allowing the stripper and goof off deeper access. I hope the area is small...good luck.
have you tried paint thinner? pour it on and let it sit, or try Simple Green, we use that for oil and grease, it picks it right up! good luck
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