Read on for tried-and-true treatments that really work on the most common culprits for concrete stains. Oil spills leave unattractive black splotches ... a slight hint of color might always ...

Use it to stain their concrete floor. Let it dry. Run your nap roller again to give it a more vibrant color. 3. ... Plain Nap Roller Plus Mist This staining technique is also known as ‘misting’.