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To prevent rusting on an old cast iron skillet or wok, you can follow these steps:

  1. Season the cast iron: Seasoning creates a protective layer on the surface of the cast iron, preventing rust and providing a non-stick surface. Start by thoroughly cleaning the skillet or wok with hot water and mild soap if needed. Rinse and dry it completely.

  2. Apply oil: Apply a thin layer of cooking oil or a dedicated cast iron seasoning oil to the entire surface of the skillet or wok, including the inside, outside, and handle. Make sure to coat it evenly.

  3. Heat the cookware: Place the skillet or wok upside down in an oven preheated to around 350°F (175°C). Let it bake for about an hour. This process helps the oil to polymerize and form a protective coating.

  4. Cool and store properly: Once the cookware has cooled down, it is ready to use or store. Avoid stacking other cookware on top of it, as this can cause damage to the seasoning. If storing for an extended period, you can place a paper towel or cloth inside to absorb any moisture.

Additional tips to prevent rusting:

  • Avoid prolonged exposure to water: Moisture can lead to rust formation, so try to minimize contact with water. After cleaning, make sure to thoroughly dry the cookware before storing it.

  • Use and clean the cookware regularly: Regular use and proper cleaning can help maintain the seasoning and prevent rust. Avoid leaving food or liquids in the cookware for long periods.

  • Re-season as needed: Over time, the seasoning on cast iron may wear off or become damaged. If you notice rust spots or food starts sticking, it's a good idea to re-season the cookware following the steps mentioned above.

By following these guidelines, you can keep your old cast iron skillet or wok in good condition and prevent rusting.

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