Vinegar is the key to getting a rusty cast iron pan back in shape, but you need to watch that it doesn't corrode the iron.

Now a regular at the monthly Antiques Faire, Affoumado has become a go-to Bay Area specialist in cookware restoration.

Square cast iron grill pan with wooden handle on a thick square cutting board with a wooden salt grinder and small oil jug - Aleksei Isachenko/Shutterstock ...