* and can be used to fine tune as needed when you begin to see some feathering of the paper. It does not damage the punch in any way like sand paper can, even fine grit.
Here is a closeup of the before and after the Heavy Duty Aluminum Foil
I have placed a piece of contrasting paper under the punched holes for better view. You can absolutely see the difference. I punched the foil 5-6 times to achieve these results. You'll find that each punch behaves differently, depending on volume of use and type of paper being punched. I have discovered that this works for me as monthly maintenance.
Want to pick up an Adjustable Diary Punch of your own? It is available on Amazon.
*This does not work on plastic punches like All Pro or Filofax Portable Punches