This spring, BOPA partnered with Visit Baltimore to clean up the Patapsco River Project, removing trash, weeds and graffiti. In other cases, they have hired conservators to repaint artwork — like the battered Red Buoyant sculpture along the Inner Harbor by local artist Mary Ann Mears — or applied hot wax, as conservators did to a decades-old statue of Thurgood Marshall downtown. Today, Red Buoyant gleams brighter. Thurgood Marshall is recognizable as the first black Supreme Court justice. And the Patapsco River Project looks more like it did when it was first installed as a “gateway to the city” in the 1970s.