I always use electrolysis for de-rusting cast iron. The Pie Irons I pictured above were cleaned up with that method. It couldn't be easier. I've never seen anything take more than a couple days though. He left out of the video to wash the piece between the electrolysis bath and applying the new seasoning, but maybe it's so obviously anyone should know that. Electrolysis rust reduction is self-limiting which is nice, because it won't hurt anything if the piece is left in there a day or two longer.
I liked his method for seasoning, using a one-burner stove outside and applying multiple coats in a short time. I'm going to have to try that.
I have some frying pans that have thin sidewalls but heavy bottoms. I have to disagree that you should only look for the ones that are heavy throughout. Sometimes it's nice to use the thinner-walled ones because they're lighter. They will also heat faster. Most of the heat during stovetop cooking is on the bottom of the pan, so thinner sidewalls don't make much difference in the cooking.
I just got a new Lodge grill pan yesterday. New cast iron toys are such fun.
