![driveway - How can I remove chalk line stain and clean concrete residue? - Home Improvement Stack Exchange driveway - How can I remove chalk line stain and clean concrete residue? - Home Improvement Stack Exchange](https://i.stack.imgur.com/hBy9q.jpg)
driveway - How can I remove chalk line stain and clean concrete residue? - Home Improvement Stack Exchange
![Vinegar stained concrete floor. This happened a few months ago. When I wet it down with water the stain disappears but once the water is dry it reappears. I don't know how Vinegar stained concrete floor. This happened a few months ago. When I wet it down with water the stain disappears but once the water is dry it reappears. I don't know how](https://i.redd.it/7w54ves1lrla1.jpg)
Vinegar stained concrete floor. This happened a few months ago. When I wet it down with water the stain disappears but once the water is dry it reappears. I don't know how
![driveway - How can I remove chalk line stain and clean concrete residue? - Home Improvement Stack Exchange driveway - How can I remove chalk line stain and clean concrete residue? - Home Improvement Stack Exchange](https://i.stack.imgur.com/LmbZS.jpg)