Just on a theory discussion level, I suspect silver dip wouldn't have a good effect if it is an nickel oxide rather than a sulfide. I would experiment with a dilute Nic-a-date type of solution as a dip if I was inclined to take a chance. That said, I do not believe the risk is worth it on this coin, the obverse might be enhanced slightly, but the reverse is too deeply corroded, that even a dip would not help and might even reveal more damage, either way, it will be visible and at best detailed.
Just take this as Devil's Advocate, but 11K feedback can mean nothing more than 11K transactions with ignorant buyers. Seriously. Regardless, you run the risk of really making this coin look odd if the darker areas are removed to reveal bright spots.
Got the coin the other day, it's been cleaned as you can see hairlines under magnification. I don't think I'm going to send it in, as it has no shot at a clean grade. I think this ones heading for the chopping block. Wish it wouldn't have been cleaned.
Stains are tough to remove. I don't think the coin can be helped but I would give it an acetone bath.
It's still a gorgeous coin. I've always been a fan of "meaty" key dates, despite any problems. And knowing you, I'm sure you got it for a great price. Personally, I love it!
I kinda agree that it doesn't look like debris...just discoloration/stains. So I'm not sure the normal quick and safe fixes will improve it. And it seems to me as if this coin has been cleaned before anyway although it could just be the pictures.
i agree. there is an ebay seller that i won't mention the name now, but anyway, they sell vintage baseball cards. their photos do not show that all of the cards have creases. that seller has a 100 percent positive rating with over 10,0000 positive feedback.