I found this product doing an online search for how to clean silver jewelry - I was very unhappy with the miserable, smelly dips that can damage both metal and skin. But I'd had so much trouble every time I ever used old-fashioned paste polish. There was an article link on Wiki that caught my eye, because I live in Indy, about cleaning a Georgian tea set for the Indianapolis Museum of Art. The curator preferred all natural, which again I'd never had any luck with, but said if you're fighting thick tarnish, the best product was made in Jeffersonville, Indiana, called Blitz.