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 Replies: 17 / Views: 1,582 |
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Pillar of the Community
 United States
4594 Posts |
There used to be a seller on ebay who sold baggies of porcupine quills for poking at gunk. apparently softer than the softest metal, so it didn't cause damage. At least that was the pitch. -----Burton 50+ year / Life / Emeritus ANA member (joined 12/1/1973) Life member: Numismatics International, CONECA Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club Owned by three cats and a wife of 40+ years (joined 1983) Author: 3rd Edition of the Sample Slabs book, https://www.sampleslabs.info/ |
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Pillar of the Community
 United States
6562 Posts |
 Figured out a workaround by saving the image from Photos to the Files app. |
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Pillar of the Community
United States
6562 Posts |
I'm a little skeptical that thorns or keratin quills are any softer than wet bamboo, for example. I rather doubt that you can scratch a 75/25 cupronickel alloy with a toothpick. I thought the concern was that the light corrosion and dirt that constitutes a patina can be visibly scratched by much softer objects like wood or nylon.
The issue with these flecks is that wiping just moves them around, but they are determined to adhere to the metal. I would assume that as the flecks dry, they will just strongly bond to the metal again.
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Bedrock of the Community
United States
94367 Posts |
I've used wood toothpicks my whole life and never had a problem.
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Moderator
 United States
189673 Posts |
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I've used wood toothpicks my whole life and never had a problem. Same. It is my weapon of choice when "physical persuasion" is needed. |
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Bedrock of the Community
United States
25570 Posts |
Brandmeister, if acetone isn't removing it try a different solvent. Xylene, perhaps, or water. Maybe peroxide, although I don't know if it is recommended for coins.
Inordinately fascinated by bits of metal with strange markings and figures
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Pillar of the Community
United States
6562 Posts |
Per the recommendations made by the inventor of Verdicare (whose CCF username escapes me at the moment), I start with just ordinary hot water. That does a decent job of removing many kinds of circulation crud. If hot water doesn't work, I escalate to pure acetone. I start with an hour, then overnight, then 3-7 days.
Alas, I do not have xylene.
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Moderator
United States
189673 Posts |
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Per the recommendations made by the inventor of Verdicare (whose CCF username escapes me at the moment), I start with just ordinary hot water. BadThad. He posted his recommendation to follow the polarity ladder (Water -> Acetone -> Xylene or Hexane) http://goccf.com/t/57008#447106 |
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Moderator
United States
97904 Posts |
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I've used wood toothpicks my whole life and never had a problem. I've used a moistened Bamboo skewer (a longer tool for me to handle) with no issues.. |
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Bedrock of the Community
United States
19969 Posts |
Light verdigris, easy removed with VC but always try the Polarity Ladder first.
Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Pillar of the Community
Canada
9168 Posts |
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but always try the Polarity Ladder first. Can you please explain? |
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Moderator
United States
189673 Posts |
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Can you please explain? See the link I posted above. BadThad gives a great explanation. |
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Valued Member
United States
293 Posts |
Try Q-tipping it with Coin Care that might work. If that doesn't you might want to let it soak in mineral oil for a day.
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Moderator
Australia
16861 Posts |
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but always try the Polarity Ladder first.
Can you please explain?Here's a quick summary. Got something you think is "goo" on your coin? Do this, in this order: - Soak it in water. Rinse in fresh water. Let it dry. Is the goo gone yet? If not, proceed... - Soak it in acetone. Rinse in fresh acetone. Let it dry. Is the goo gone yet? If not, proceed... - Soak it in xylene or hexane. Rinse in fresh xylene or hexane. Let it dry. Is the goo gone yet? If not, then... too bad. It's not really "goo", it's actually corrosion. You'll need to switch to corrosion removers to clean your coin. The ladder starts with water, because it's the most polar, and a surprising amount of real-world gooey things are highly polar and thus water-soluble. Sugars and starches, for example. Water is also cheapest and safest - no point in going straight to the expensive, hazardous solvents when water would work. Now, if you know for certain that it's a specific kind of goo - PVC goo, for example - then you can jump straight to the solvent that works best for PVC goo (acetone), because you already know that water won't touch PVC goo. But for "unknown mystery goo", try the ladder. Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
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Pillar of the Community
United States
6562 Posts |
I've occasionally had good results with boiling tap water, compared to just regular cold water.
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Posted 02/20/2024 1:11 pm
