Sidewalk Stenciling?

I found this while wasting time online, kinda interesting, i mean, how would you go about buffing this out? Do you leave it to mother nature to clean up or do you start scrubbing the floor now?

Sidewalk Street Art Stencils From Los Angeles

I find it always interesting to look down and see where your walking you may be surprised at what you see. Here are some shots of some beautiful stencils, mostly from La Brea Ave and some from Downtown Los Angeles.

Street Art Bear Stencil From La Brea Ave

Street Art Stencil By VR in Downtown Los Angeles

"Slave", Street Art Stencil from La Brea Ave

Street Art Stencil from La Brea Ave

"Stop Wars", Street Art Stencil

"Make Your Own Art", Street Art Stencil From Downtown Los Angeles by Mr. Brainwash

Street Art Stencil From Melrose Ave

Street Art Stencil From La Brea Ave

Street Art Stencil From La Brea Ave

Street Art Stencil From La Brea Ave

Street Art Computer Stencil From La Brea Ave

source: http://www.thedirtfloor.com/2010/07/14/sidewalk-street-art-stencils-from-los-angeles/