Reverse graffiti is a relatively new trend that takes street art to a whole new level. Dutch Ink, a lively group of inventive artists located in South Africa, have a new installation entitled Flight 101. The clean tags are made by scrubbing the filthy walls with steel brushes. The result? Lovely birds in flight! The piece is etched into the Umgeni road interchange, spanning a section of the Umgeni river. Clean graffiti has been all the rage in this area, and it's no surprise why.