Priory Polishes Metal Cleaner - Cleans Gold, Silver, Brass, Copper & Bronze Easy to use Perfect for jewellery Cleans to an amazing shine Cleans Brass, Copper and Bronze, Silver, Gold and Precious Metals Can be used in an Ultrasonic Cleaner Priory Polishes Metal Cleaner is a low odour but strong cleaner for delicate items such as Jewellery, it is used for cleaning Brass, Copper, Bronze, Silver, Gold and Precious Metals etc and removes oil, grease, dirt and tarnish leaving an 'as good as new' shine to your piece.