Has anyone had any luck hand brushing Vallejo Model Air paints?

I haven't, but my first reaction to your question is that they would be far too thin and wouldn't cover the primer or basecoat without many layers. The "regular" lines of Vallejo work quite well so I'd recommend using those instead if you are doing figures or detail work. If you're looking to brush-paint a vehicle because you don't have an airbrush, I guess I'd suggest you try spray paint first. In my experience, it's extremely difficult to get a smooth finish devoid of brush marks when painting acrylics onto large flat surfaces.

Hope this helps.

Hello,
I regularly use Vallejo Model Air for brush painting. For this I use the paint right out of the jar after a thorough shaking. Using a synthetic bristle brush (orange bristles) I can paint mark-free surfaces with one or two quick brush passes. Occasionally I add a drop of white Vallejo thinner for when painting larger surfaces (say areas up to 2in by 2in) or add retarder when painting details or shades on figures.

Air metallics, grays, browns, blacks cover very well, reds, yellows, greens and blues rather don't, these colors should be airbrushed for opacity.

While not the ultimate solution for brush painting, you can use Vallejo air conveniently for quick small touch-ups or detail painting. For large area brush painting I would anytime go for Humbrol enamel, Gunze or Citadel.

Thanks for the replies. I do have an airbrush, and i was considering switching to these paints because they spray really well. I was just curious to know about their versatility.

since you haven't bought any, get the following:
spray: model air,
brush: model colour, get drying retarder & their thinners as well.
model colour can be thinned for airbrushing, btw.

Ive read that you shouldnt airbrush MC because it contains cadmium. I have a few of both MC and MA and like them much more than Tamiya paints- they brush much better and i find that i can get a gritty texture with Tamiya when i spray them. MC goes on super smooth.

Yes, but the Cadmium is in such small quantities that it will really do no harm. Vallejo has to put the warning on the label because it is in the paint, but not at a level that would do any harm.

I have talked to Alex Vallejo (one of the owners) himself at length about this, and it is all just a legality on their part to be able to have their paint distributed world wide.