Has anyone ever airbrushed with inks before? Because of the bright colors that are available in ink,I would like to use them to color a resin dinosaur that I have purchased but I want to try to minimize any problems that I might encounter when using this medium. Any tips/tricks/pitfalls would be greatly appreciated.

Yes, I have but not on models. Years ago I used a Paache double action at work to colour large, paper display maps and engineering drawings using water colour inks. The typical airbrushing dogma applied such as light misting coats to begin with, keeping the air pressure to a lower setting (15-20 psi maximum) and running water through the airbrush regularly to clean it, especially between colours. The water colour inks I used ( I can't remember a brand name, sorry) were very translucent, producing nice pastel colours. You will need to account for this as the ink may not be opaque enough so a very good, neutral primer coat will be required.

Bob

Bob covered it. :-)
Learned airbrushing using inks.
work fine, but as Bob said very translucent, as in water colors, but you can get nice interesting results, especially on grey aircraft. (must be the neutralness of grey!) Will have a tendency to bead up over a high gloss coat.

EDIT forgot to mention, if you learn to airbrush inks, you'll have no problems airbrushing extrememly thin paints.

I think the ink brand Bob was thinking of was Pelikan. I believe it's still around as other brands are too.
cheers!
edit: Higgins is another popular brand