That's why I tried to give the thought experiment. Set up whatever conditions you want that will take a freshly minted coin through the darker...
You know...I am still wondering about this lol. I was Googling some more still trying to figure it out. I came across my own question and re-read...
The spot might not have been that bad prior to encapsulation, huh? So nasty.
Oooh here's one. On eBay...would love to break this thing out and fix it up. I don't know how this is Pf66--perhaps it's based on the low...
I'll take altered surfaces over a carbon spot any day :) Id smash a slab to take out a straight graded coin with a carbon spot to alter its...
Thanks Kentucky! Did you find that the sodium sulfite only ate away at the sulfur spot?
Wow. How easy it would be to keep this to yourself. To take the time to sit and put that together in that kind of detail for your fellow anonymous...
Really? Haven't come across that in my hunt. Like the homemade-power supply modification electrolysis? Or like some high tech thing? And would it...
Great stuff, desertgem--good food for thought. I'd like to find the right chemical--even if it's just to spot treat. I remember buying a Dansco...
Didn't want to "call you out"! You are awesome and have been very helpful and have shared freely of your knowledge and experience. Numismatics is...
Thank you for sharing your experience. Really appreciated. Maybe the mineral oil would work better? Have read others who've had success. And...
I have 1,000s of Lincoln Wheat cents and 100s that are BU. There are dozens with black spots. Black spots that EZ-est and the like will not...
I'd love to chemically remove my spots. What chemical is the question. I must admit I didn't have high expectations when I started this thread. I...
That's good. If they scraped them, there would be no hope. I've seen things saying long soak in mineral oil could break some of these down without...
Here I found this description of NCS: "Founded in February 2001, Numismatic Conservation Services (NCS) is devoted to expert conservation of...
I guess I feel some hope that there is a way based on the understanding that NCS will conserve a coin with these spots. They have some method....
This is great--and what I hoped for. Even if an unsuccessful attempt, its worth hearing. One less experiment others will have to try.
Oh I am not saying scraping leaves no evidence. It certainly does! Often I find this better than the carbon spot. I don't mind a discoloration...
Me too! Ugh they are the worst. And I forgot to mention "fly specks"--those tiny little carbon spots. I believe that's what they're called. There...
Hello I wanted to start a discussion about conserving bronze/copper coins with black spots. I see these mostly referred to as "carbon spots" but...
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