"My First Potato Peeler (Sparschäler) I Got This Sparschäler 10 Years Ago Already Used By My Grand Mother. It Is Still A Mass Product And You Can Buy It For Round About 5 USD. But This One Is Made In West Germany So At Least 33 Years Old And Almost Daily In Use"
Yep you can't kill an old cast iron pan unless you are really trying to, and even then it would take work to do anything permanent. Covered in rust? Just sand it down coat it in oil and bake it in the oven, finish restored...