Years ago at the Pacific Film Archive they screened…
The Subconscious Art of Graffiti Removal by Matt McCormick, 2001
(If you click on the link, you can see the whole thing on Fandor. Or watch an excerpt on YouTube.)
A similar, if perhaps less intentional, process: humans removing something generate beautiful forms! Functional abstraction! Shapes in space! Hurrah!!!
Thank you, Steve Seid, for telling me about this!
Image borrowed without permission from a 2007 film program website.