The time it takes to remove rust spots from a well-seasoned cast iron skillet can vary depending on the severity of the rust and the method you use for rust removal. Here are a few common methods and an estimation of the time it might take:
Scrubbing with Salt and Oil: If the rust spots are not too deep, you can scrub the skillet with a mixture of coarse salt and oil using a sponge or scrub brush. This method might take around 10-30 minutes of scrubbing, depending on the size of the skillet and the extent of the rust.
Vinegar Soak: Another method is to soak the affected area in a mixture of equal parts white vinegar and water. This should loosen the rust and make it easier to scrub off. After soaking for about 30 minutes to an hour, you might need to scrub for an additional 10-15 minutes.
Electrolysis: For more severe rust, some people prefer to use electrolysis, which involves setting up a simple electrolysis rig to remove the rust. The process can take several hours, but it requires less manual effort as you let the electrolysis do the work.
Commercial Rust Removers: There are also commercial rust removers available that you can use following the manufacturer's instructions. The time required will depend on the specific product and the level of rust, but it's generally a quicker option compared to the natural methods.
After removing the rust, you'll need to re-season your cast iron skillet to restore its non-stick properties and prevent future rusting. This involves applying a thin layer of cooking oil or solid shortening to the skillet and baking it in an oven for a certain period, typically around 1-2 hours.
Remember that rust removal from a cast iron skillet is a gradual process, and you may need to repeat the steps several times if the rust is stubborn or widespread. Additionally, regular maintenance and proper storage of your cast iron skillet can help prevent rust from reappearing in the future.