| Author |
 Replies: 10 / Views: 1,737 |
|
|
Valued Member
New Zealand
89 Posts |
This New Zealand 10 cent coin from 2007 features a tuatara, an ancient lizard-like creature with three eyes (true story). Alas some genius decided all 15,000 coins issued would be encased in soft plastic so 10 years on and all the ones I've seen are suffering from a nasty green residue. After reading posts in this forum I tried acetone, which was amazingly effective, both in removing the stuck-on plastic and the green tarnish (see the before and after pics). However, dark spots remain where the green tarnish was. Is there anything I can do about that? Or is that permanent damage? If it helps the coin is copper-clad steel. Many thanks! The coin while still encased in soft plastic...  ...and after soaking in acetone:  |
|
|
|
Moderator
 United States
56855 Posts |
|
|
Rest in Peace
United States
18456 Posts |
I would normally say use Verdi-Care on it but in this case I don't think it will help much because of the underlining steel . See what others have to say .In the mean time, holder it in a non PVC holder .  |
|
Bedrock of the Community
United States
94367 Posts |
You've done the right thing using acetone. My educated guess is that this is the best it's going to look.   to the CCF! |
|
Bedrock of the Community
United States
10038 Posts |
Tuatara on a coin - cool - one of the "living fossils."
Unfortunately I agree that this is likely the best it is going to get. There has been a chemical alteration to the metal in those spots.
How much squash could a Sasquatch squash if a Sasquatch would squash squash? Download and read: Grading the graders Costly TPG ineptitude and No FG Kennedy halveshttps://ln5.sync.com/dl/7ca91bdd0/w...i3b-rbj9fir2 |
|
Moderator
United States
188342 Posts |
I believe the surface is permanently altered and there is nothing you can do to reverse it without totally ruining the coin. Sorry.  |
|
Pillar of the Community
United States
8715 Posts |
 Sorry to see that...but at least the acetone made a decent improvement. |
|
Pillar of the Community
Canada
1527 Posts |
Cleaned coin looks like completely different coin, look at the 1.
|
|
Valued Member
 New Zealand
89 Posts |
Thanks for the feedback, I was afraid that was as good as it would get. At least it looks better than it did and it's now safely sealed in a non-pvc holder. Excellent spotting @GMS5 by the way, I have two the same (apart from the damage pattern) and used the wrong 'before' pic.
|
|
Pillar of the Community
United States
751 Posts |
GMS5, my thoughts exactly. Are we sure it's the same coin ? I noticed several non matching spots.
Dan
|
|
Valued Member
United States
97 Posts |
Agree, different coin. You cannot put corrosion on a coin in a place it was not by using acetone.
|
| |
Replies: 10 / Views: 1,737 |
|
Posted 10/17/2018 08:04 am
