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Yes, you can re-season an old rusty cast iron skillet to restore its non-stick surface and prevent further rusting. Re-seasoning involves cleaning off the rust, applying a layer of oil, and then baking the skillet to create a protective seasoning layer. Here's a step-by-step guide on how to do it:

Materials you'll need:

  1. Old rusty cast iron skillet
  2. Steel wool or scrub brush
  3. Dish soap or mild detergent
  4. Water
  5. Clean, dry cloth or paper towels
  6. Vegetable oil or any high-smoke point oil (e.g., flaxseed oil, canola oil, grapeseed oil)

Instructions:

  1. Remove Rust: Scrub the skillet with steel wool or a scrub brush to remove the rust and any food debris. If the rust is heavily built up, you may want to use a little bit of coarse salt as an abrasive while scrubbing. Rinse the skillet with warm water.

  2. Wash the Skillet: Use a small amount of dish soap or mild detergent and warm water to thoroughly wash the skillet. This will remove any remaining rust particles and ensure the surface is clean.

  3. Dry the Skillet: Use a clean, dry cloth or paper towels to completely dry the skillet. It is crucial to remove all water to prevent new rust from forming during the next steps.

  4. Apply Oil: Pour a small amount of vegetable oil or any high-smoke point oil onto the skillet's surface. Use a paper towel or cloth to spread the oil evenly all over the skillet, including the outside and handle.

  5. Remove Excess Oil: After coating the skillet with oil, use a clean paper towel to wipe off any excess oil. The skillet should have a thin, even layer of oil without any pooling.

  6. Bake the Skillet: Preheat your oven to around 375°F to 400°F (190°C to 204°C). Place the skillet upside-down on the oven's middle rack, with a baking sheet or foil on the bottom rack to catch any drips. Bake the skillet for about an hour.

  7. Cool and Repeat: Once the baking time is up, turn off the oven and let the skillet cool completely inside the oven. You may repeat the seasoning process (steps 4 to 7) if you want to build a thicker seasoning layer. A well-seasoned cast iron skillet becomes more non-stick and durable over time.

  8. Maintain Properly: After re-seasoning, it's essential to maintain your cast iron skillet properly. Avoid using soap for cleaning and never put it in the dishwasher. Instead, clean it with hot water and a stiff brush or a non-abrasive sponge. Dry it thoroughly and apply a thin layer of oil after each use to keep it in good condition.

Remember that re-seasoning may take a couple of rounds to build a perfect non-stick surface. The more you use and care for your cast iron skillet, the better its seasoning will become.

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