https://www.cbsnews.com/colorado/video/crews-will-remove-graffiti-at-lake-pueblo-state-park-in-colorado/
Crews will remove graffiti at Lake Pueblo State Park in Colorado - CBS Colorado
Boaters started noticing the vandalism on a specific area of the rocks at the lake last summer.
remove graffiti
https://www.nps.gov/articles/000/podcast-007-using-lasers-to-remove-graffiti-from-rock-art-and-rock-imagery.htm
Podcast 007: Using Lasers to Remove Graffiti from Rock Art and Rock Imagery (U.S. National Park...