The Merritt building at 761 S Broadway is one of the only marble buildings in downtown Los Angeles. Over time, it had accumulated so much graffiti, you could barely see the surface. As a commercial property, renting retail and office space, this left a negative impression on potential customers.
Cleaning of the exterior was done using Quintek Rotec Vortex Technology. It is the only physical cleaning method that is gentle enough to prevent damage to the texture of natural stone, such as marble. It was used to clean the entire building, removing layers of soiling and encrustation.