Insures a bright, even, durable finish on metal in stained glass. Polishes and protects against tarnish for a professional finish. Directions are printed on the bottle. In short, you apply to soft dry cloth, buff on and buff off with dry cloth. This compound mixture helps in the prevention of oxidation of metals. It polishes and shines glass without any damaging affects on the metals used in art glass or stained glass. Apply after cleaning. For cleaning instructions visit our Policies page. Bottle of liquid Finishing Compound is 12 oz. with a squirt top.