Polishing or coating of coins?

I just recieved some sets of coins from a family member with titles like "Americas Greatest Coins", "Historic Buffalo Nickel", etc. In these sets are just old beat up circulated coins with various dates and degrees of wear. I noticed however that while some of the coins just look old and circulated, there are a few which look like they have either been polished until they shine like diamonds, or have been coated with something to make them look that shiny. I was just wondering if anyone knows for sure wich it is? I can tell there is not much value to these kind of sets that i would guess come from tv or ads in coin magazines that sell them for ridiculous prices. Any ideas are great and would be welcome.
Thanks,
PlatinumDuck
Thanks,
PlatinumDuck
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Great Deals Buying and Selling: Metalsman, BobSav, Rick300, endzone, Swampboy, somecoins, Musca, commoncents05, Refrema, tonyhar, joebb21, kalshacon, JeremyDie1, percyb, scrapman1077, indiananationals, wondercoin, pragmaticgoat, tonedSilver, theboz11, Timbuk3, bigmarty58, HCumberdale, jp84, OnlyGoldIsMoney, UNLVino, coinguy1989, drewsef, coindeuce, pjcoins, giorgio11, Sullykerry52, KollectorKing, privatecoin, jclovescoins, Smittys, bronco2078, ajaan, jdmern, bidask, jrt103, CoinPhysicist, bigjpst, OKCC, Skanderbeg, pruebas, dizzlecc, MasonG, spummybum, SurfinxHI, snowequities
An authorized PCGS dealer, and a contributor to the Red Book.
They look like these platinumduck?
These are from the Washington Mint...polished (buffed) with probably jewlers rouge, so bright you can't even take a descent pic of them from the glare. You can get bullion only from a coin like this, no numismatic value because they are common dates unless extreemly rare, then it doesn't matter if you have a hole drilled through it.
Nice conversation pieces or remembrance coins only...you were correct in your assumption.
The coins would have graded good to fine untouched...now cleaned
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