CARE HK 6 - It is an effective and strong liquid with a strong chemical formula that works on cleaning and polishing copper and all worked copper surfaces. - Fast-acting, ready-to-use, removes the harmful green layer of copper and restores shine like new. CARE HK 6 COPPER POLISH - CREAM effective and powerful cream with a strong chemical formula that works on me Cleaning and polishing copper metal and all copper surfaces busy. – Isolates copper surfaces for long periods of moisture factors heat, and water.