[jyl]

Try Twinkle. No workout. Rinse pot w/ hot/warm water, wipe on the paste using the supplied sponge, watch the oxidation magically transform to gleaming copper, maybe rub sponge a little bit on any stubborn spots, then rinse it off and dry the pot. Takes about 2 minutes. Costs about $3 for a little tub that will last a few months. Find at most hardware stores. Be sure to get the Twinkle for copper, not the Twinkle for silver. We use the latter for the silverware, it works fine but not as magical as the Twinkle/copper.