R.G. Hardie & Co. Bagipie Metal Polish and Sealant Keep your pipes polished and corrosion free with the Bagpipe Metal Polish from R.G. Hardie & Co. This solution is non-abrasive so it will not damage metal or wood. It can be used on silver, nickel, brass, and alloys. 50ml bottle, only a small amount is needed, and a microfiber cloth is recommended for application.