This GLASS Paint Spray is a fantastic way to re-color, brighten up or create innovative glass based effects; the more layers applied the more opaque the effect. Perfect for DIY and creative applications like creating shadows or adding a splash of color to the light passing through your chosen glass surface. Excellent for practical applications like frosting window glass to create areas of more privacy through a milk glass like finish, or to simply vary the light entering a room to achieve more ambiance or warmth. Not recommended for use on acrylic or plexiglass surfaces.