DEAR ACCIDENTAL CHEF: For my wedding, my grandmother gave me one of her antique cast-iron skillets. I’ve never used cast iron, and I’m not really sure how to care for it. Also, the skillet has started to rust, so I’m not sure if it’s usable anymore. Can you help me?—Confused About Cast Iron DEAR CONFUSED: You are one lucky gal. A well-weathered cast-iron pan is like hitting the cooking jackpot. The great thing about cast iron is that the more culinary wear and tear it receives, the better it is.