Graffiti has its pros and cons. When done tastefully, graffiti can be a beautiful thing, livening up a wall or adding character to a building. On the opposite side, tagging and poorly-executed graffiti can dampen any business, home, or office. Generally speaking, graffiti has a negative connotation.
But this artist has established his street art as a sort of reverse graffiti. He was inspired while working as a dishwasher in a restaurant. After cleaning off a smudge on the wall, he realized that the impact of his cleaning had made an even bigger mark than the original dirt spot.