Hi,
I've recently purchased a Harder&Steenbeck Ultra 2 in 1, to replace a cheap chinese airbrush that I've been using for the last six months.
Since the first test with the new airbrush, I've had the same problem: it sputters badly as soon as I press the trigger for air. It starts sputtering few seconds after loading the paint, projecting a small cloud of darker dots or a larger, single drop farther away. I've thought that the issue may be the thinner ratio, so I've tried thinning the paint I'm using (Vallejo Model Air) much more than usual, adding flow improver, changing the pressure. Always the same results. And the sputter presented also with Tamiya paints (diluted 1:1) and with the 0.4 needle included in the box.
I've spent a lot of time cleaning thoroughly every part (I've noticed that there seems to be a lot of paint accumulating in the needle and and the nozzle), checking for cracks or bent needle, but nothing seems to be out of place.
I am a bit disappointed because I've never had this kind of issues with the chinese airbrush...
Am I doing something wrong or there's some problem in the airbrush?
Thank you
Bye