connection provided on the connecting flange of the atomiser 1 through a pulsed air valve pl the train of pipes of the atomiser 1 can be cleaned with pulsed air through the pulsed air valve pl which is itself also known a flushing agent valve vv also branches off from the common node of the colour changer valve assembly 3 and the main needle valve hn ending at the flushing connection v on the connection flange of the atomiser 1 so that conventional solvent flushing is possible through the flushing agent valve vv in addition to the colour changer valve assembly integrated into the atomiser 1 the inventive coating system has a separate colour changer valve assembly 14 which is structurally separate from the atomiser and which may take a conventional form as described for example in ep 1 502 657 a2 at this point it need only be mentioned that the external colour changer valve assembly 14 is configured as an a b colour changer and has two paint outlets which are separately flushable meaning that the colour changing time and colour changing losses can be reduced on the outlet side the external colour changer valve assembly 14 is connected to a metering device 15 which has a volumetric metering pump 16 17 for each of the two paint outlets of the external colour changer valve assembly 14 whereby the two metering pumps.