An air flush system for a spraying system includes an air compressor unit and an inverter. The air compressor unit integrally comprises a compressor including an electric motor configured to operate upon receipt of alternating current voltage, a tank provided in fluid communication with the compressor and configured to store air compressed by the compressor; and an outlet provided in fluid communication with the tank and configured to selectively dispense compressed air from the tank to a portion of a spraying system to facilitate purging of material from the spraying system. The inverter is configured to selectively convert direct current voltage from a vehicular electrical system into alternating current voltage suitable to operate the compressor. A method for cleaning a spraying apparatus is also provided.