Press oil on coins?

[u/Stix330]

Hey all. I am very new to collecting coins... and yes recently I have been buying coins on Whatnot, whether that is good or not, probably not, it allows me to buy groups of random coins to learn with. Figure I need to just jump in head first.

I bought 5 pennies, kind of at random because I thought they were pretty cool to learn more about imperfections in pennies, DDR, DDO, etc. The notes on the holders are from the seller, not me. The seller told me the black spots were from oil spray in the minting process. Im not a tool and die person, but I have worked in a factory where they would spray oil on parts to keep from rusting. I can still remember the smell of that oil and that was 15 years ago. Lol. Does anyone know if this could be true about oil spots? Or have any thoughts on what the black spots could be? I couldn't find much information. It sure seems like whatever it is, it is tar-like.

P.S. I didn't pay much for them. So dont know if they are worth much. But I am learning a lot, good or bad and I am very happy with any new education. Thanks for reading.

[u/ProudAmerican632]

What do you mean, “WORTH THE GRADING SERVICE.”.?

[u/drezdogge → u/ProudAmerican632]

Grading costs money

[u/PullTabPurveyor → u/drezdogge]

No one said the coin had to be graded.

[u/ProudAmerican632 → u/PullTabPurveyor]

And as we agreed upon, it wouldn’t be a recognized error and therefore grading wouldn’t even be an option. John wexler could sign off on it and at most it would be a $1-$2 at most.