Buffed?

[Cent1225]

Opened a bag of cents tonight and found about 80% of them looked like this.
In Picture 1, Both copper(2 rows on left) and zincs(2 rows on right) were this way.
Pic 2 is close up of buff marks.
The zinc was showing on the edge of several of them.
Looks like someone went to a lot of trouble to try to clean them up.
Thought you might enjoy a picture of them.

[Bigsarge]

Looks like someone tried cleaning them with a SOS pad.

[Thogey]

Looks like someone tried cleaning them with a SOS pad.

Or a bench grinder.

[penny pretty]

found the exact same rolls. edges(rims) werent touched, just the faces. had to be done by hand, but WHY?

[hobo finds]

found the exact same rolls. edges(rims) werent touched, just the faces. had to be done by hand, but WHY?

to read the dates

[mtldealer]

To make them looked burnished? But why?

[sparechange]

Probably found metal detecting, hit with a buffer for dates but not sure why on the reverse?

[newton7]

Metal detector finds. You got to clean them up enough to get the counting machine or teller lady to take them. Often people use what ever they have and speaking as a fellow detectorist, pennies are the most common coin found in the lower 48. Zincs corrode and some don't survive the cleaning enough to be taken by machine or human. Many of my bad zincs get rejected from both lady and machine so they get pitched.

Copper is copper so I'd keep them.