How to know if a piece has been polished?

I'm new to collecting coins, I joined in 1921, peace dollar (I know which is rare) that someone said was worthless because it seems that there polishing or cleaning, a further agrees. I think the test. I have tested since 1956 until now, so I know what they seem. Now, how can, indeed, has been cleaned or polished everything they say. People who were agreed and disagreed merchant currency. Then they told me confused.

I agree with Silverpet-if you ask so you do not clean the patina acting brilliance is in the money any coin.If age you have an old and brilliant that has probably been cleaned, most currency traders are.But nobody told you are worthless oil has no idea what they are sold saying.I money from my old money a while ago, not cleaned, and got the sale price of a wholesale dealer.It 's in your collection, no matter what a friend of says.Get a good book for beginners online, go to counseling.

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