I’m going to show you how to season your cast iron cookware so that it will have a non-stick surface. The more you cook with cast iron the more non-stick it becomes. It’s a process. You would also use this method if you found some old cast iron at a yard sale and it needed to be stripped and re-seasoned.
Cast Iron 101: How to use, clean, and season a cast iron skillet
How To Clean and Season Old, Rusty Cast Iron Skillets -- What You Need: The end chunk of a potato (enough to be able to hold firmly), Course salt, A rusty cast iron skillet, A little vegetable oil (canola or olive will do) -- Equipment: Gloves (optional, but recommended)