A utility-power operated, tamper-proof pressurized spray can (12) that can only be operated when connected to a-c utility power. Thus, its use to spray graffiti is prevented or at the very least minimized. The preferred embodiment of the invention consists of a spray can (12) having a housing opening (12B) to which is hermetically attached a solenoid housing (14). The housing (14), encloses a standard spray control valve (18) having in series, a linear-motion solenoid assembly (22) consisting of a stationary armature (24), a movable armature (28) and an external, separable movable-armature activator (40). The stationary armature (24) is rigidly attached to the housing (12), has a lower guide tube bore (24H) therethrough and an upward facing spring cavity (24G) which retains a spring (26). The movable armature (28) is located atop the stationary armature (24) and has an upper guide bores (24H,28C) is inserted a guide tube (32) which functions to deliver paint and as a positioning guide for the movable armature (28). The activator (40) includes an electromagnetic coil (42) that fits over the solenoid housing (14). When a-c power is not applied to the activator (40), the movable armature (28) remains in an upward position that prevents paint flow. When power is applied, the movable armature (28) moves to a downward position which allows paint to flow when a spray head (20) in the spray control valve (18), is depressed.