Quote:
I never heard of conserving proof coins but good luck with that
I've done if myself and I've had it done by TPGs. Mostly on modern silver commemorative proofs. The owner of my LCS has also show me some cloudy Kennedy proofs he sent in to NCS. They came back looking amazing.
Even if coins have always been encased in OMP, they can develop cloudy fields or hazy spotting. That's easily removed using the right methods. Maybe it won't get the coin completely back to a straight from the mint look. But it can get it 98% of the way there. And that makes a HUGE difference on eye appeal.
I collect foreign olympic commemoratives. Especially those from the host country that year. Hear's one I picked up cheap because of the lack of eye appeal. But I think I was able to make it look better. Nothing I ever plan on selling. Just wanted it to look nicer for my collection.

