Supplies

• Fine steel wool/sandpaper
• Detergent
• Brush or (abrasive) sponge
• Tea towel or kitchen towel

Step-by-step plan

1. Take steel wool (or sandpaper) and scrub vigorously over the rusty parts of the pan. After a while, you will see the original (silver) cast iron reappear. By doing so, you are in fact also removing the anitanium layer from the pan. Otherwise, never use coarse cleaning products on a cast iron pan.
    
2. After the cast iron pan is rust-free, you can begin to thoroughly clean it. This can be done with a brush or sponge, warm water and a dash of dish soap (not too much and not too aggressive).
    
3. After cleaning, dry the pan thoroughly. Once the pan is thoroughly dry, you can begin to pickle/season the cast iron pan. By doing this you reapply the non-stick coating, so to speak, with natural oil. 

Note: This treatment only applies to removing rust from untreated pans!

It is always a shame when your pan is damaged, but luckily you can continue to use Pan! The damage is in the enamel layer, which is a kind of glass layer over the pure cast iron. These are natural materials that are not a health risk. We recommend rubbing the place with a little oil after use, otherwise it can rust again. Now you can use the pan again.