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Replies: 14 / Views: 833 |
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Valued Member
Canada
308 Posts |
Hi everyone, I know the rule "do not clean your coins", but I can't help but wonder how some of these old coins on this site look so shiny compared to mine? I noticed that some are not in sealed mint sets and they still look incredible. It's hard to believe that a 50-60 year old AU coin can look as good if it hasn't ever been tampered with. Your expert thoughts are greatly welcomed. Any way I could make mine shine that way without damaging them? Thanks Edited by Jess1234 03/25/2023 8:01 pm
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Pillar of the Community
United States
2194 Posts |
I mentioned on the page with Zurie's page on silver dollars a few good reasons 
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Valued Member
Canada
308 Posts |
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Pillar of the Community
United States
8978 Posts |
A common mistake made is that being "shiny" means a coin is worth more money. A coin being shiny coin does NOT make it more valuable unless that shine s from original mint luster.
Any attempt to shine up a coin is easily detected not only because those coins no linger have sharp details, but have been worn from circulation. Coins that are in the condition they left the mint will have crisply defined details in their design.
Add to the previous point that original mint luster can never be restored b/c that luster is a direct result of many tons of pressure slamming down onto the metal between the coin dies in a split second (also generating great heat) when the coin is minted. You need all of those things to create the original mint luster. No chemical or cleaning duplicates that physical process. As for how some very old ones stay the way they were when made: It is because they had been stored away under the right conditions. They were not circulated (used) to get worn down.
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Valued Member
Canada
308 Posts |
Thanks for your very clear and elaborate answer Earle42! Much appreciated!
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Pillar of the Community
United States
5843 Posts |
Also many coins are "dipped" in a chemical bath that usually removes tarnish but doesn't affect the metal. The bad little secret about 3rd party graders is that many dipped coins will straight grade.
But there are some original coins that were stored in a controlled environment in archival conditions that didn't allow the environment to affect them. Some of these coins get a pretty toning from the storage but otherwise look like they came from the mint yesterday.
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Valued Member
Canada
308 Posts |
Forgive my question Fhjacinto, but what do you mean by straight grade?
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Bedrock of the Community
United States
12011 Posts |
Earle42 -- Excellent summation.
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Pillar of the Community

United States
5800 Posts |
Quote: Any way I could make mine shine that way without damaging them? Generally speaking, you are more likely to do harm than good. The best approach is to acquire coins that already look that way
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Pillar of the Community
United States
5843 Posts |
To answer your question.
When a third party grader (like Anacs, PCGS or NGC) grade a coin they look for signs that a coin was messed with or has some type of damage.
If a dipped coin has no metal removed or damage from the dipping it will get a straight letter grade like MS65 (mint state 65 on a 1 to 70 scale).
If the coin was over dipped and damage was done to the luster or the metal the coin will get a details grade like Uncirculated cleaned or Uncirculated Harshly Cleaned. It's no longer straight grade.
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New Member
United States
15 Posts |
I actually just saw a video on this yesterday. I can't remember who the guy was. He was a professional dealer with years of experience, and he said some coins can be cleaned, but you have to do it right. He had cherry-picked a bunch of Peace dollars and dipped them in something called E-Zest. They came out looking pretty good, but none were perfect. So not all coins can be cleaned. The key is being able to spot the ones that can, and that takes experience.
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Moderator

United States
124763 Posts |
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Valued Member
Canada
308 Posts |
Thanks for the link Jbuck! Really interesting! Not sure I'd attempt it though. Not confident enough yet!
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Pillar of the Community

United States
1842 Posts |
I keep E-Zest around myself, but have never used it on any collectible coin, only to lightly treat silver bullion rounds which have been improperly stored and have acquired unattractive toning. Personally, I'd advise against using it in general. However, if you do try it, follow the instructions explicitly (including the safety procedures) and practice A LOT on junk silver. It can take surprisingly little time to cause permanent and irreversible damage to a coin. Another danger is not properly removing all residue after dipping - I've seen coins that were damaged by not following the proper cleaning procedures after dipping (a lot of them can actually be seen in negative online reviews for E-Zest  ). I've never had any issues myself, but I usually go through the rinsing process as recommended several additional times and follow up with an acetone soak...
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Moderator

United States
124763 Posts |
Quote: Thanks for the link Jbuck! Really interesting! Not sure I'd attempt it though. Not confident enough yet! You are welcome and I am glad you acknowledge your hesitance to use it. 
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Replies: 14 / Views: 833 |
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