1. Sand the surface: First, use sandpaper or a sander to sand away the rust until the surface becomes smooth.
2. Clean the surface: Use detergent or alcohol to clean the surface thoroughly to make sure there is no residue.
3. Apply anti-rust agent: Apply anti-rust agent to the cleaned surface to prevent it from rusting again.
4. Re-plating: If necessary, a layer of metal can be re-plated on the surface to restore its appearance.