Removing Rust from Cast Iron

Removing Rust From Cast Iron

Below are different methods of removing rust from cast iron:

  • Vinegar - Rub the rusty surface with plain white vinegar at full strength and allow it to sit for a few minutes. Once the vinegar starts to dissolve the rust, use your wire brush or steel wool to begin cleaning the affected area. Repeat until the rust is gone.
  • Baking Soda Paste - As an alternative to using vinegar, you can attempt to clean rust off cast iron grills and other metal surfaces using a thick paste made from baking soda and water. Apply the paste to the rust build-up and allow it to sit for a few hours. Then, scrub away the paste using an abrasive surface, repeating as necessary.
  • Salt Paste - If you need something more abrasive than baking soda or vinegar to remove the rust from your cast iron grill, make a thick paste of kosher salt and water. Apply it to the rusty area, then use steel wool or a wire brush to scrub away the rust. Repeat as necessary. For particularly stubborn rust, you may need to begin your cleaning efforts with a salt paste but may find that you can switch to the less abrasive baking soda paste once the first few layers of rust have been removed.
  • Fine-Grit Sandpaper - This is the most abrasive and efficient way to remove corrosion from cast iron

Once the surface rust has been removed, it is imperative to provide a protective barrier between the raw metal and the moisture in the air, or debris left in the bottom of the grill that will hold moisture. It’s just like Grandma’s cast iron skillet. You must thoroughly and regularly coat in 100% oil (Vegetable, Olive or Animal Fat) and bake it in. You will go through the seasoning process 3 times to build-up that hard, protective enameling on ALL the metal surfaces of your grill. We find it helpful to keep a spray bottle of 100% vegetable oil by the grill and give the entire grill a light coat after each use.

Attached below are a few links that could be helpful to you!
How to Season Your Grill

How to Oil Your Grill Grates After Use

Remember, the most important part of the cleaning is the follow-up seasoning. Using the grill at higher temperatures can burn the seasoning, so it is important to season regularly. Coating the grates with oil between uses can also help prevent rust, and ALWAYS allow the grill to cool completely with the hood open to prevent trapping moisture inside, which can significantly accelerate corrosion.

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