Aerosolizing liquids ...  I had this experience ... it was not painting, but treating a hedge.

The answer for me was a set of redundant filters: ... If one clogs, remove and set in the water bottle, and apply a clean one.  Worked fine until all were clogged up.  I found that freshly mixed nixed fewer replaceable filters than hours old (some bio chem going on there).

I doubt that the airbrush (I have one, but cannot use it worth peanuts) has such a nice feature, but if you are still airbrushing .. I would let the manufacturer know of the concept ... who knows how much canvas, time and angst would be saved.

Now it is a whole new ball park, I am essentially starting from scratch in Poser Pro 2010 ... Lots of stuff to learn!!