Q: I have a cast-iron skillet that I have been using for a few years. It has brown, rust-colored stains that don’t come off, no matter what I do. I’ve tried kosher salt and a small chain, soap, a ...

Scrub rust with vinegar or baking soda, then wash and dry the pan thoroughly. Re-season the pan by applying oil and baking it upside down in a hot oven. Proper care prevents rust and keeps cast iron ...