i use gti pros they retail bout £360 each i think and i have 3 of this then some cheap knock offs of the gti pro which were about £35 a gun which to be fair there isnt much differnce between the real deal but the cheaper ones wearout after a year or so you need a seperate gun for primer, water base and laquer so three guns in total for base coats i use a 1.3mm nozzel