Universal Metal Stain Remover Kit for Unknown Metals

The user is struggling to remove stains from an unknown metal type, having tried general wipes without success. This indicates a need for a versatile and safe cleaning/polishing solution that can be used on various metals without causing damage, especially when the specific metal composition is unknown. A kit that includes gentle polishes and perhaps different applicators or a 'test patch' guide could provide a much-needed solution.