![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)
driveway - How can I remove chalk line stain and clean concrete residue? - Home Improvement Stack Exchange
![Seattle, USA. 4th May, 2021. Late in the day a chalk message on the sidewalk after the East Police Precinct began to remove the concrete barriers put in place back in August Seattle, USA. 4th May, 2021. Late in the day a chalk message on the sidewalk after the East Police Precinct began to remove the concrete barriers put in place back in August](https://c8.alamy.com/comp/2FM00FC/seattle-usa-4th-may-2021-late-in-the-day-a-chalk-message-on-the-sidewalk-after-the-east-police-precinct-began-to-remove-the-concrete-barriers-put-in-place-back-in-august-28th-2020-the-barriers-were-put-in-place-after-the-seattle-police-took-back-the-precinct-from-the-occupying-chop-protestors-and-shortly-after-a-protestor-started-a-fire-outside-the-north-side-of-the-building-they-have-now-installed-a-permanent-20-ft-fence-outside-the-precinct-credit-james-andersonalamy-live-news-2FM00FC.jpg)
Seattle, USA. 4th May, 2021. Late in the day a chalk message on the sidewalk after the East Police Precinct began to remove the concrete barriers put in place back in August
![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)