Big K..you got to start sometime..10 - 15 minutes in Acetone wont hurt it.Clad quarters are pretty tough and I've soaked pre 82 cents for up to 48 hours with no harm...have to be more watchful on zincolns,to long of a soak can cause black staining...start off with non errored coins and take timed notes...As far as this 25c, I too read the earlier post...and IMO all I'll say is and good luck..
Thanks. Just never seen a coin in 13 weeks after release look like this, yet still have the cartwheel luster. Does anyone know if acetone would remove annealing staining? Or it absolutely wont remove it, Like if this coin missed the after annealing wash or something even, or maybe cooked too long, I have to assume the wash after annealing is done to remove impurities or copper from annealing from the surface. I'm not so much interested in going further and further trying to clean the coin, I tried distilled water and rolling a q-tip over it for some time and nothing changed. I have plenty of examples of new 2019P AMP quarters without these markings already, so no need to really try to clean off this one unless it would somehow prove conclusively it was an annealing process error, Pre-strike, if it didn't come off. I just don't know. I think given the right chemicals and time, I could make the whole coin disappear am I right? LOL