[header] How to make a padlock shim [title] Find a good can. [step] You can use just about any aluminum soda or beer can. The only requirement is that the sides of the can be smooth (without ridges), since you will be using the metal from the sides to make the shim. 
[title] Empty the can completely and rinse it out with warm water. [title] Use scissors, tin snips, or a knife to cut off the top and bottom of the can.