My cheap Chinese airbrush finally gave up while i was painting the Roma , and started to spit the color.Apparently the head  ruptured and although a tiny rupture , this is the result.I decided i needed to invest to something better this time and bought a Harder&Steenbeck Evolution 2 in 1 .Still a couple of days without any airbrush .A cheaper chinese copy might be also a good idea to have as a back up emergency option.