The French artist ZEVS is known to many because of his spectacular "Visual Kidnapping" campaign. At the Berlin Alexanderplatz he cut a female figure out of an oversize advertisement banner from the company "Lavazza" and "blackmailed" them to make a 500.000 Euro donation to the "Palais de Tokyo" in Paris. For some time now, he has been dealing with the methods and techniques of Graffiti cleaning troops in Paris and the momentariness of Graffiti. In Wuppertal, he worked with his subsequently created Clean Graffiti Technique. He designed dirty walls by working his pieces into the walls with cleaning machines, thereby creating a negative. The many dark, dirty and old industrial buildings that shape the cityscape of Wuppertal inspired him to do this work.