Stained permanently?
DollarAfterDollar
Posts: 3,214 ✭✭✭✭✭
Help me out here. I bought a nice PL Morgan at auction that appeared to have grey grease on the reverse. I thought, no big deal. It's not grease. I tried acetone, acetone/MS 70 and I boiled the coin for 30 minutes. Nothing is removing this stain.
I'm thinking Methyl Ethyl Ketone or Alcohol but I don't know if those might hurt the luster. Any ideas. This substance is definitely "on" the coin.
If you do what you always did, you get what you always got.
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Acetone is already more aggressive than alcohol.. MEK is about as strong as it gets... good luck and be safe!
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The surface under there may already be affected and if removed would look grey and flat and very noticeable.
How long did you leave it in the acetone?
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Doubtful there is any remedy after what you already used.
Yeah that looks done for. Unfortunate.
"It's like God, Family, Country, except Sticker, Plastic, Coin."
@DollarAfterDollar ... There may be damage to the surface of the coin beneath that substance. Be careful with further efforts, since stronger solutions may damage luster (if any is there). Can you remove any with a rose thorn?? Or is it resistant to manual force as well? Cheers, RickO
Only about 30 minutes. Today I'll give it a long bath.
Leave it in a sealed container for days.
Did you pick at it with a rose thorn?
As @ricko suggests. Agree with @gumby1234 that the surface may hold an unpleasant surprise once it’s off there. 🧐
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Yes try a long acetone soak. It just might work. rinse and gently pat dry so as not to scratch it.
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I think you’ll likely need some mechanical effort to remove that. It’s also likely that you’ll either cause some unintended damage or uncover something you don’t like.
Might not be a grease stain, just saying.
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Looks like a foreign substance, like some kind of glue.
That is, raised above the surface rather than just a surface discoloration.
Unfortunately I don't know enough about alternative solvents to know what to try, other than longer in acetone in a sealed jar.
I wonder what goo-gone would do? I've never tried it, and if anything, I'd go with days and day in acetone as other suggested.
Been in acetone about 12 hours. Still no progress. I was wondering about goo gone too. Gotta read the label tomorrow.
Goo gone is weaker than acetone.
If MS70 didn't work it's probably toast. Maybe xylene and a q-tip?
"It's like God, Family, Country, except Sticker, Plastic, Coin."