I would have sworn I had replied in this topic, but apparently, I hadn't.
There's no reason not to use an airbrush for figures, and many good reasons have been given by our fellow Planeteers. I have just used mine for the first time on some figures, a pair of 1/20 resin figures from Scale 120 for Maschinen Krieger. It was an experiment, because I knew I had relatively larger areas to cover, and I wanted to see how evenly the paint would go on. The experiment worked pretty well, pretty much what I expected. Here's the first figure, Helen, a mercenary from the MaK 'verse:
For her pants, I used my Paasche VL to apply Tamiya acrylic Flat Khaki as the base color. Here's the other figure, Gertie, a pilot for the bad guys, the Strahl Demokratische Republik:
For her uniform breeches, I used Tamiya flat acrylic NATO Black. The scheme I'm applying is based on the old Prussian uniform colors, and NATO Black is my go-to color for black in scale. Regular black is too dark to start.
The exercise was instructional, and I can see expanding use of the airbrush for figure work. But I will think seriously about masking, even when applying the first color. On Gertie, the NATO Black oversprayed onto the bottom of her tunic, and it's darkening the Andrea Prussian Blue that I'm applying by hand, which effect you can see here:
It's such a pain to try to correct this, that I've thought about stripping the paint and starting over, before I go any further and waste any effort.
One more word about using an airbrush with figures--visit Cody Kwok's site, Cody's Coop,
http://codyscoop.com/ Cody paints
a lot of anime figures in larger scales, as well as mecha subjects. He makes use of his airbrush often, especially for base coats of color and for applying skin tones, which he follows up with hand-brushing of various media for shading. It should give you an idea of what's possible, with the airbrush.
Prost!
Brad
PS-If you have an old jar of Tamiya acrylic Flat Aluminum, say, 20 years old, no amount of thinning will let you airbrush it successfully. Ask me how I know (he said, as he field-stripped the Paasche and cleaned the parts with lacquer thinner).