| Author |
 Replies: 20 / Views: 2,396 |
|
Pillar of the Community
Portugal
655 Posts |
One old US gold coin is irritating me. It has some liquid or oil big spot. It should be ms64 or ms65 condition otherwise. My guess of condition, metal surface is almost perfect. This past liquid splash noticeable changes the tone of the coin.
The spot has not harmed the metal. It is not something corrosive. Is it crazy to try soaking, just soaking, the coin?
Could lessen the visual impact of this spot. Or do nothing because it is too embedded.
Gold is a bit soft even in this alloy. I usually avoid even touching the sides. But this one gets at me when I see it. Hard to leave it alone.
If it is ever is sent for grading do stain-like spots or discolorations worsen the grade?
|
|
|
|
Pillar of the Community
United States
2231 Posts |
You can use the search line here on CCF, you'll find numerous posts about cleaning coins. Most recommend to dip in acetone and not to clean a collectable coin. You could post pics for more precise advise.
|
|
Bedrock of the Community
Australia
21786 Posts |
If the deposit on the coin is organic, acetone should remove most, if not all of the deposit.
A problem that may arise is if the (organic) deposit has sulfur or chlorine in the (chemical) compound, it may react with the copper in the alloy of the coin, and leave a slight stain.
Acetone will not remove any stain that is a product of the reaction of the oxidizer (in this case, most probably sulfur or chlorine) with the copper in the alloy.
If the coin is MS-64, leave well alone after the acetone soak.
After the acetone soak and
if you send for grading, it may well come back
MS-64 comment: stain(s).
|
|
Valued Member
United States
316 Posts |
|
|
Bedrock of the Community
United States
94367 Posts |
|
|
Pillar of the Community
 Portugal
655 Posts |
@ sel_69l Thank you for the advice, it was most helpful.
Sorry I should not post a pic unless I keep the coin. Have an option to return it and may do so yet. Must check it better for oxidation before attempting acetone.
|
|
Pillar of the Community
 Canada
5394 Posts |
Without pictures no way to offer any
proper advice ?
Show us what you are on about!
|
|
Pillar of the Community
United States
2365 Posts |
|
|
Valued Member
United States
316 Posts |
People are really awesome on here. It would help you to post a picture. It's not going to hurt or impead a return should you choose to do so itnwould only validate should youbhave to return it. The ladies and gentlemen on here are good! You have reservation and that's understandable so why not post it itnwould be in your interest.All up to as always just don't wait I'd say. Good luck on whatever decision you make.
|
|
Pillar of the Community
United States
630 Posts |
Gold is a Noble Metal, and older Gold coins that have their "original skin", that are Unc. and Copper-alloyed, do not take kindly to any type of cleaning, at all, by Acetone and EzEst especially. Strippers will make the luster of old BU Gold coins unnaturally bright, and circulated coins will look worse. Depending on the type of stain the OP's coin has sustained, it could have and probably did attack the Copper in the coin. Removing it incorrectly could compromise the surface, and that can't be "fixed"
Edited by Oldgrouchyguy
04/19/2023 6:32 pm
|
|
Pillar of the Community
United States
3645 Posts |
Quote:
Gold is a Noble Metal, and older Gold coins that have their "original skin", that are Unc. and Copper-alloyed, do not take kindly to any type of cleaning, at all, by Acetone and EzEst especially. @Oldgrouchyguy, I agree 100% about EzEst, as that's a harsh acid that will quickly strip any coin of original luster and can easily damage the coin. However, from my experience acetone should only remove any organic contaminants and not harm the original skin or luster of the coin, even for gold alloys. I've seen remarks in the past about acetone having an adverse effect on copper or alloys containing copper, but have never observed that myself. Member of SPMC, FCCB, ANA and ANS. My U.S. Classic Commemorative Complete Set: https://www.NGCcoin.com/registry/co...sets/278741/My U.S. Fractional Note Set: https://notes.www.collectors-societ...eSetID=34188 |
|
Moderator
United States
188213 Posts |
|
|
Pillar of the Community
United States
3645 Posts |
Quote:
It requires a soak during an extended exposure to sunlight or UV. Not really something to worry about. Thanks, jbuck. Member of SPMC, FCCB, ANA and ANS. My U.S. Classic Commemorative Complete Set: https://www.NGCcoin.com/registry/co...sets/278741/My U.S. Fractional Note Set: https://notes.www.collectors-societ...eSetID=34188 |
|
Pillar of the Community
Portugal
655 Posts |
Thank you all for the information. I returned the coin. There is no problem in posting a picture of this problem spot. Here it is. It looked like someone could already have tried cleaning that spot, not good. So I did not want to unwrap the coin before return.  Light from one side, there are traces visible on that spot only. Edited by jecz79
04/20/2023 8:03 pm
|
|
Pillar of the Community
United States
630 Posts |
|
|
Valued Member
United States
316 Posts |
Good decision. Sometimes it is for the best for something is bound to come your way far better. Things work out certain ways for a reason, ya know.
|
| |
Replies: 20 / Views: 2,396 |
Posted 04/19/2023 12:01 am
