what do you thin acrylic paint with !

[Zen Badger]

Metholated spirits also works well.

It's what I use when I'm airbrushing with acrylics.

[wibblywobbly]

I use Vallejo model color paints, rather than the Model Air, as they are thicker. I always use water and they spray on to a perfect finish. Nice thing is that you can brush paint with them too and it dries to an almost perfect finish. Great for mixing paint as they come in handy squeezy bottles so you can just squirt a couple of drops onto a piece of styrene, use it as a pallette and 'pull' colours together till you get the shade you want.