An aerosol spray can (12) that can only be operated when connected to an a-c utility power source provided by a power cord (50A) connected to an external activator (40). The can is modified by adding internally, a movable armature (19) that operates a valve assembly (16) connected to a spray head (20). When the armature is not energized by the attached activator (40), the valve assembly (16) remains in a closed position, preventing the flow of paint. Conversely, when the movable armature (19) is energized by the activator (40), the valve assembly (16) opens allowing paint to be sprayed when the spray head (20) is depressed.