To remove rust from a cast iron skillet, you can follow these steps:
Scrub the rust: Use a scrub brush or steel wool to scrub away the rust from the affected areas. Make sure to scrub gently and remove all loose rust particles.
Rinse and dry: Rinse the skillet thoroughly with warm water to remove any remaining rust particles. Dry it completely using a clean towel or by placing it on a stovetop over low heat until all moisture evaporates.
Apply cooking oil: Pour a small amount of cooking oil, such as vegetable oil or canola oil, onto a paper towel or cloth. Rub the entire surface of the skillet, inside and out, with the oil to create a thin, even layer.
Bake in the oven: Preheat your oven to around 350°F (175°C) and place the oiled skillet upside down on the oven rack or a baking sheet to catch any drips. Bake it for about one hour.
Cool and repeat: Once the hour is up, turn off the oven and let the skillet cool inside. If necessary, you can repeat the oiling and baking process a few more times to build up the seasoning and restore the skillet's non-stick properties.
The time it takes to restore the seasoning of a cast iron skillet can vary. It depends on factors such as the severity of the rust, the number of times you repeat the oiling and baking process, and how well you maintain and use the skillet afterward. Generally, it may take a few cycles of oiling and baking, with each cycle taking about an hour, to achieve a well-seasoned surface.
Remember, seasoning develops over time with regular use and proper maintenance. Each time you cook with oil or fats in the skillet, it helps enhance the seasoning. Additionally, avoid using acidic or corrosive ingredients that can strip away the seasoning, and always dry the skillet thoroughly after each use to prevent rust from forming again.