Rust removal? Now with pictures.

[stansdds]

Rust removal

a question for Alec Baldwin

Ooooooh, that's bad. LOL!

 

[JH1951]

The pictures give me an idea of what you are dealing with lead me to the media blaster cabinet followed by a cold blue.

 

[rvolvr]

....Make sure it's a real older Copper penny and not one of the newer Bi-Metal types that are (I think ) Aluminum with a copper plating or some such thing.
Real Copper!...

The "modern" core metal is Zinc. 1982 was the transition year. Up until early '82, pennies were solid copper. They're pretty easy to distinguish in a side-by-side comparison, but if you're not sure, just avoid '82 altogether. Anything earlier is solid copper.

I forgot an obvious exception - a couple years during WWII when they were made of steel. No way to mistake these.