The Huffington Post -
21 Mar 2016 20:36

Reverse graffiti -- otherwise known as clean tagging, grime writing, or green graffiti -- is a type of street art that involves the removal of dirt from a surface to create an often semi-permanent image. There is no paint or wheatpaste involved. All it takes is a little elbow grease (or, more accurately, a little power washing) to create an ephemeral work of art from the very pollution that plagues our cities. Street artist Moose has used it, so has Alexandre Orion, and now, South African arti...
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