How to Remove Paint from Concrete and Other Stains

You can’t scrub oil and grease stains away. The trick is to draw them up out of the concrete with trisodium phosphate (or a TSP substitute), water and an absorbent material.

Patience is the key. Old, long-neglected stains may require two or three applications for complete removal. And even then, some stains might still show, or the freshly cleaned area might look slightly different from the surrounding concrete.

Removing Stains from Concrete

Mix Up an Absorbent Solution

• Pour 1 ounce of trisodium phosphate (or TSP substitute) and a cup of water into a small bucket and mix.
• Add about a cup of absorbent material and mix to make a creamy paste.
  • Pro tip: Wear eye protection and rubber gloves.

Article source here: How to Remove Paint from Concrete and Other Stains