I have used the mentioned Vallejo paints for some time and can recommend it.
It is a spanish product, and I thing some companies i US sell this paintproduct
Vallejo Premium colors is a waterbased, non toxic paint to air brush lexan bodies, and comes in opaque, metallic, fluorescent and candy. Can be thinned with their reducer, but not always neccesary. Can be used as it is from the bottle. Compressorsetting 30-60 psi ( 2-4 bar).
It is possible to use Fascolor layers of paint together with Vallejo paint ( have not tried to mix the 2 painttypes together)