Thanks everyone. Crazy how an acid eats the layers differently. I wonder how long ago it ended up like that and what acid did so much damage. Getting my 3.5 year old into collecting coins after we found my grandfathers collection as he passed 15 years ago. Figured it would be something fun we can do together and she would learn paying attention to detail and give her something to do sifting my box of pocket change from the past 20 years and later my grandfathers box of coins. This one is a great example of why not to clean a coin I'd say. Thank everyone.