Graf Layers
As the building next to this one in Clinton Hill was torn down floor by floor, layers of graffiti were added and locked in place as they became out of reach. As the new building goes up, they will disappear for a long time until the new building is torn down, or they will be gone forever. Interestingly, the bottom layer, below the white paint, has either paint or tiles that say Kurtz, which is presumably related to the original builders or possibly tenant of the building.