Abstract: A device and process for applying decorative paint to an article of clothing such as a T-shirt or sweatshirt. The device comprises a valve/nozzle assembly and a plurality of disposable, single-use cartridges of pressurized paint. The valve/nozzle assembly includes a threaded fitting having a piercing member extending therefrom that pierces a cover on a selected cartridge as the cartridge is threaded over the fitting. Upon piercing the cover, paint is forced upwardly into a valved passageway within the valve/nozzle assembly. A hinged lever is operatively coupled to the valve such that as the lever is depressed, a spray of paint is released through the nozzle at the end of the valve/nozzle assembly and onto the garment. Thereafter, the cartridge is removed and a second cartridge of paint thinner is attached to the valve/nozzle assembly. Again, the lever is depressed to release a spray of paint thinner through the valve/nozzle assembly for cleansing same.