Here are some ways to remove super glue from metal:

1. Acetone or rubbing alcohol: Soak a cotton pad, ball, or rag soaked in acetone or rubbing alcohol for 5 to 10 minutes. Then, the glue can be scraped away with a plastic scraper, putty knife, or razor blade.

2. Boiling water: Pour boiling water over the glue until it is melted, and then the metal object should be pulled away from the glue.

3. Coconut oil and baking soda: Combine coconut oil and baking soda to remove super glue from metal without acetone. Baking soda dissolves adhesive bonds while coconut oil loosens the grip that adhesive forms on a metal surface.

4. Petroleum jelly: Apply petroleum jelly to the super glue and let it sit for a few minutes before wiping it away with a cloth.

5. Olive oil: Apply olive oil to the super glue and let it sit for a few minutes before wiping it away with a cloth.

6. Vinegar: Soak a cloth in vinegar and place it on top of the super glue for 15 minutes before wiping it away with a cloth.

7. Lemon juice: Apply lemon juice to the super glue and let it sit for a few minutes before wiping it away with a cloth.

8. Sandpaper: Sandpaper can be used to remove super glue from metal surfaces by sanding down the glue until it is removed completely.

Remember to clean and dry the area before and after applying any of these methods.