This took about 45 minutes.
The larger rimmed skillet is the first cast iron that I bought, about a year ago from Target with a gift card left over from our wedding. I had been looking for some at the thrift stores but realized I'd never find a pan season for my vegetarian. There's nothing romantic about Target but it was cheap. The smaller rimmed skillet is a gift from my aunt for my vegetarian who has hard time lifting the larger heavy pan.
The other two are from a friend. For these I used the salt and oil method to clean them up again. I heated all the pans individually and rubbed them down with olive oil, heated them up even higher and coated them again. Then fancy photography.