JCB, I've used Gunze for the last few months, are using predominantly Lifecolour, and these paints spray beautifully. They are every bit as good as Tamiya's acrylics.
Just thin them about 60/40, paint to thinner, and that should be fine for most paintwork.
Obviously as plasticmod, says you'll want to go a little thinner on paint if mottling.
I use Tamiya's acrylic thinner, and this works fine with Gunze.
Karl