RCM is at it again with its strange fractional silver. https://silvergoldbull.com/silver/1-2-oz-2015-bald-eagle-silver-coin#description-1053
So far I have kept my distance from the products of RCM. Just too much negative news on milk spots on other coins produced by RCM.
I bought some of the 1 1/4th oz Bison Coins. They are sitting in a tube with some maples and a falcon. I'll check them out oneday and will note the results. Hopefully they don't all develope those spots. I have a few in airtites aswell and will see if they suffer the same fate
HP sauce on a cloth then rub the coins with it for about a min and it cleans off milk spots a treat. Also Auto Sol cleans them up nice and shiny.