The leading tarnish remover for cleaning and preserving copper and sterling silver, CLR PRO Tarn-X is highly effective at brightening and shining. No buffing required and the clean-rinsing formula leaves no residue, and saves time and effort! Perfect for use with copper fixtures, silverware, sterling silver, platinum, gold, copper coils and fins, heat exchangers, copper pipes, HVAC, welding and plating prep, precision optics, recycling, and metalwork.