Congrats Tankergeoff,
I saw your post over in armor forum. Lots of people who know lots of stuff in here.
OT but on the compressor: If you don't have noise restrictions,
a $60 two gallon campbell hausefeld is a good way to go.
A cheap $5 moisture trap is a must.
OT again: 3M (or other orgainic rated) ventilator mask is a must.
I went for a few sessions without one and got terrible headaches.
We joke alot about the "fumes" in modeling but
an airbrush is the ultimate aerosolizer. Acrylics will kill your lungs and enamels
will kill your brain cells (Sorry, I'm off the preacher soapbox now
)