How to remove rust from cast iron

Have you recently stumbled upon an old cast iron skillet tucked away in a forgotten cabinet, only to discover it covered in unsightly rust? Perhaps you’ve inherited a vintage cast iron pot that holds sentimental value but has seen better days. Whatever the case, the good news is that restoring cast iron to its former glory is entirely possible, and you don’t need to be a seasoned chef to do it. In this guide, we’ll walk you through how to remove rust from cast iron and get it ready for use again.

To remove rust from cast iron, start by scrubbing the affected areas with a mixture of coarse salt and oil or use steel wool. Rinse and dry the item thoroughly before applying a thin layer of vegetable oil and baking it in the oven at a low temperature for about an hour to re-season it.

Restoring rusted cast iron requires some patience and the right approach. First, gather your materials: you’ll need coarse salt, a neutral oil (such as vegetable or canola), steel wool or a stiff brush, paper towels, and an oven. Begin by thoroughly rinsing the cast iron item to remove any loose debris. Next, sprinkle a generous amount of coarse salt onto the rusted areas; this acts as an abrasive to help lift away the rust. Drizzle some oil over the salt, and using your steel wool or stiff brush, scrub firmly in a circular motion.

For more stubborn rust, you may need to repeat this process a couple of times to ensure all the rust is removed. Once satisfied, rinse the cast iron again and dry it completely with paper towels–water can quickly lead to more rust. To re-season the cast iron, apply a thin layer of your chosen oil all over the surface, ensuring to cover the inside and outside without excess pooling. Preheat your oven to around 350°F (175°C) and place the cast iron upside down on the middle rack, placing a baking sheet or aluminum foil on the lower rack to catch any drips. Bake it for about an hour, allowing the oil to bond to the metal, creating a protective layer. Turn off the oven and let the cast iron cool inside before removing it; once cooled, it’s ready to use and enjoy!