With Sackys the spotting problem wasn't because of the planchet rinse, it was because of the unique alloy. And the way they solved it was they finally found a coating that worked, a coating that was applied after striking, that helped prevent the spotting. Even then it was still only a temporary fix for the coating is/was easily removed or worn away. The mint was aware of the spotting problem from day one, long before the coins were ever released. A coating was their answer but the first few they tried didn't work.
acetone half hour bath looks a little better but actually its just the photo - spots appear to be not affected
Spotting was very common on the 2000 coins. Eventually they added a machine that washed the planchets in a secret solution after the annealing ovens but before the strikes. I had a floor tour of the Philadelphia Mint in 2009 and my guide called it "the spalecking machine," but that is just because of the name of the German manufacturer, Spaleck, on the side of the wide horizontal drum.
I have several sets of P/D/S Sac's saved for our granddaughters, no spots on them so far. The rest I put back into circulation. Thanks for the pointer I'll keep an eye on them.
So since there are no more spotted small dollars ,my spotted coins should get more valuable - right? Everyone will want at least one spotted coin for their collection.
I recently sold a wounded eagle 2000P Sac to a dealer for $450. The guy was tickled pink to get it. I have quite a few Sacs even some "chocolate" brown ones. One Cheerios Sac sold on Ebay Dec 28th 2020 for 1900.00
The one that sold on ebay shocked me because I thought no way someone would pay that much. Check the completed auctions it should still be there.
Who knows but it was there as a completed listing plus it was marked sold. I looked at the tail feathers and didn't think it was a cheerio but it deff had bold tail feathers just no smaller lines.