Tru-Color Paint comes in two lines, spay-able and brush-able formulas. Some modelers have said they were able to thin and apply the brush-able line with an airbrush. Most brush-able colors are already available as a spray-able color, though.
Here's a link to an IPMS modeler's experience with Tru-Color: http://web.ipmsusa3.org/content/tru-color-paints
You can also find videos with modeler's experiences with Tru-Color Paints on YouTube.