Assembly comprising an airbrush

An assembly comprising:

• an airbrush comprising a stylus defining a pickup chamber that is subjected to a stream of entrainment air,
• a dispenser comprising at least two compartments containing different base products,
• an outlet interface fixed to the dispenser, the outlet interface comprising an end piece having internal passages running through it, these internal passages respectively communicating with outlet orifices for the base products coming from the compartments, the outlet interface comprising a mounting part for fixing the stylus to the dispenser, and
• volumetric metering devices for pressurizing the at least two compartments and dispensing the base products to the airbrush, the volumetric metering devices comprising a motor causing a piston to move in a corresponding compartment or a piston moved by a drive mechanism comprising a motorization system formed of motors coupled to gearboxes, the base products being delivered to the airbrush via the outlet orifices and the corresponding internal passages of the outlet interface, the internal passages of the outlet interface extending directly up to the pickup chamber of the airbrush so that mixing of the dispensed base products occurs in the airbrush.