I can sign all what Sandy said!
I love the WWI line (some linen shades, PC10, PC12, ...) and the spray beautifully at low pressure, in thin layers. Like Alclad in color

The are dry immediately, you can touch one side of the wing while spraying the other.
But I have also not tried the primers, here I use Alclad with microfiller (white, gray and black).
I'm doing all (Alclad and MRP) with a 0.2 needle.
You really need to shake them carefully, because the pigments settle quickly. So I use only smaller amounts in the airbrush (micro cap in my Harder & Steenbeck Infinity) and refill if needed.
Cheers,
Frank