The Army Painter: Air Matt Varnish

The Army Painter Airbrush Varnishes are non-toxic, water-based acrylic varnishes designed for use with the airbrush.
Formulated to ensure a smooth and even coat when applied through an airbrush, these varnishes protect your miniatures from chipping and wear and tear.
Airbrush Varnishes comes in spill-proof 100 ml./3.3 fl.oz. dropper bottles for easy dosage.