Ah the stuff on the back is silvo I cleaned the sticker area to avoic issues with flatness of the sticker. that should wipe off. I dont do these with a magnifying glass so missed it. For the other issues I dont really know what to say I thought they were acceptable.
Thanks for the information, I will try to clean it up and see if I can get the grey matter to come out of the gaps.
I can't speak for MJ but I think my coins were acceptable. I was just really interested to know what the heck this stuff on my coin is as I thought it was really dirty or a plating error!