(AC7501) Humbrol paints release there Enamel thinners in 28ml bottle. Reduce the densitiy of our Enamel paints. Commonly used when you want to apply Humbrol Enamels via an Airbrush. Thinners is available in small and large bottles. Usage: Thinning down of solvent-based enamel paints, most commonly for airbrushing  Application: As for the paint being used  Drying Time: Paint drying times may vary with the addition of Enamel Thinners.