That's a very good idea too, but I think when I've got $2300.00 bucks into
a system, I prefer to have it (the air) filtered somewhere, somehow. Now
I know that some of the better sprayers as to what your referring have the
screen filters on them, I wonder if you modify it to have some sort of
paper filter to decrease the chances of moisture exiting the tip? Food for
thought....
Now for what I've done, I actually have a quick disconnect on the end and
have 3 different attachments that I use and the air is very precise if I
need it to be or I can have a broad spray for overall coverage and a general
purpose tip.
Now as another poster mentioned, you can put filters at the intake fans,
and I've done this before, but this still requires that you crack the case
and change them out every month or they clog and reduce air flow, and also,
right at the point that you install them, I think it causes restriction.
If you have a real bad dust problem, this would help, but if not, I would
just stick to the air method.
Regards to my fellow nerds!

Doug