To Air Is Human

The Infinity 2in1 airbrush...
well, I give up!
I have tried to spray AutoAir through the Infinity...someone told me it would work unthinned. It not only doesn't work unthinned, it won't worked thinned either!! And yes...I swapped out the tip and needle (running the .4mm). All I got was cough and sputter. Lots of clogging, terrible fine line control and just a very poor experience. And to top it all off, I think the AutoAir reducer has damaged some parts in the airbrush. There is a small o-ring that seals the paint cups to the body, which has swollen and popped out of the airbrush (and will not go back in because its too enlarged now!). I am also afraid that the insert inside the tip (which appears to made of plastic or nylon) may have also been damaged by the reducer. Stoopid me for not really examining this airbrush before using it...I just relied on the comments of others and made assumptions that were apparently wrong.
About 80% through my job, I switched over to my old worn out Eclipse which handled the AutoAir as if it had just come out the box.
Don't get me wrong...the Infinity is a very tight, well made airbrush. I am very impressed with the fit and finish and quality feel of the airbrush. I also think it may be an illustrator's dream machine...handling inks, goauche and other lightweight water based medium with beautiful results. But based on my experience so far, this may not be the airbrush for the AutoAir or enamel user. I also wouldn't recommend using Urethanes or Lacquers in it either.
I definately need to go and look at the tech info for this airbrush before I make anymore comments and find out what this airbrush is designed to handle.
And find out if the reducer has really damaged sensitive plastics within the airbrush. Some airbrushes are just not designed to use with harsher paints and chemicals.