Cleaning rust off a cast iron skillet requires a slightly different process than what you described. While you can clean a cast iron skillet in the oven, using soap and water is generally not recommended for routine cleaning, as it can strip away the pan's seasoning. Here's a step-by-step guide on how to clean rust off a cast iron skillet:
Assess the rust: Determine the extent of the rust on the skillet. If it's just a few spots or a light layer, you can likely remove it easily. If there's significant rust or the pan is heavily rusted, you may need to take more extensive measures.
Scrubbing: Use a stiff brush or steel wool to scrub away the rust. If the rust is minimal, this should be enough to remove it.
Rinse and dry: After scrubbing, rinse the skillet thoroughly with water. Make sure to remove all the rust particles and residue. Then, dry the skillet completely with a towel.
Baking: Place the cast iron skillet upside down in the oven. Set the oven to a temperature between 350°F (175°C) to 400°F (200°C), and let it bake for about an hour. This process helps to remove any remaining moisture and prevents new rust from forming.
Seasoning: After baking, remove the skillet from the oven and let it cool down slightly. Then, apply a thin layer of vegetable oil or melted shortening to the entire surface of the skillet, including the handle. You can use a paper towel to spread the oil evenly.
Baking (seasoning): Put the oiled skillet back in the oven, but this time, place it right side up. Bake the skillet again for about an hour at a temperature of 350°F (175°C) to 400°F (200°C). This process will help re-season the skillet, creating a non-stick coating and protecting it from future rust.
Cooling: Turn off the oven and let the skillet cool down inside the oven.
Remember that cast iron skillets need proper care to maintain their seasoning and prevent rust. After each use, it's best to clean them with a stiff brush or a non-metal scrubber using hot water. Avoid using soap, as it can break down the seasoning. Dry the skillet immediately after washing and apply a thin layer of oil to keep it in good condition.
If the rust is extensive or you're unsure about the cleaning process, it's a good idea to seek advice from a professional or consult the manufacturer's guidelines.