Rather than adding something – like spray paint - to a surface in order to create a design, subtractive graffiti strips something away. That ‘something’ might be dirt on a sidewalk, or soot on a wall. In this case, it’s moss.
What do you think of these colourful stairs? It sure gives colour to the town of Wuppertal, Germany! I love this simple, colorful idea! I'm brainstorming on what steps I can go paint to brighten up our city!