[Penn]

That's a lot of work to polish a pan! We use oil & kosher salt, immediately after cooking anything is a cast iron pan. They shine like the toe on a pair of Airborne Daddy Jump Boots!!!

Oh, and be careful of any cooking utensils made in China, especially Cast iron, it is rumored to contain lead.

Edit to add: Most of my shiny Cast Iron Pans were purchased at garage and estate sales. The older the better.