Pebeo Vitrail Matt Medium is designed for use with Vitrail enamel paints to create stained-glass effects on smooth, thoroughly cleaned surfaces such as glass and Plexiglas, as well as shades on metal. Apply with a brush, spatula, or pipette, and clean the tools with odorless mineral spirits.

Vitrail paints dry in 2 hours and reach full hardness in 10 hours....