Wow, if I could count how many air brushes I have got in this house I would run out of fingers to count with. My dad has been \"collecting\" airbrushes for a few years now but my brother, dad and I use about two (at the moment one due to the Trigger Iwata one being broken and in for repair) on regular.
Also my Dad uses \"his\" airbrush on painting WWII armour and more recently modern military armour.
Generally I will only use the airbrush for painting tanks, painting a grey primer coat on and sometimes putting basecoats on for figures.
As for me seeing somebody saying that they didn\'t know what mixtures are good for airbrushing, I can tell you what I generally use for spraying on most acrylics.
I use a 2:1:7 mixture .
The mixture is 2 paint (usually measures in a syringe), 1 water and about 7 - 10 drops of a liquid acrylic retarder. My dad picked this acylic retarder from an artshop (more like a giant artshop hence why the shop is called \"the artshed\") and the stuff works wonders. If anybody has ever airbrushed enamels onto WWII tanks (like I used to) the acrylic retarder makes acrylics spray on like them. It prevents the airbrush from being clogged
Also another tip I figured out was is not the mix paints in the airbrush
Cheers,
Daniel