Looking in my jewelry box I found some old 14k doorknocker earrings. They had turned a very interesting dark color in certain areas. I thought oh my gosh porosity! How will I ever get them to look good again. I had an old Connoisseurs polishing cloth. It did not specifically say for gold or silver and I rubbed those ugly spotted places and magically they disappeared and everything looks like one color again. I am so pleased. Your products really do work wonders.