Here's an Instructable on how to clean and polish your pennies and smashed pennies if they're dirty.
For all of you coin enthusiasts out there and elongated penny collectors, you will probably find this Instructable very helpful. I collect elongated pennies (you know, those penny smashing machines you see in museums and whatnot) however, after a while the pennies would start to lost their shine because of oxidation (in layman's terms: when the pennies are exposed to air, they lose their shine gradually)
I found out that you can restore the shine by rubbing a pencil eraser on the coin and therefore polishing it, however the process is long, hard, boring, and it kills your wrist.
The way I polish pennies uses the same concept, but is much more faster.
The pros and cons of this method are:
-No volatile chemicals/ fumes
-You could get a better shine with chemicals
-It would be faster with chemicals
When I write Instructables I put multiple pictures showing multiple steps on only one step, so be sure to look at all of the pictures.
Step 1: The tools
Here is what you need to do this:
-A small vice
-A bunch of those cheap pencils you can get at the dollar store
-A small saw (like one you'd get on a multitool)
-Dirty, oxidized pennies just waiting to be polished