someone taped this to an album or something. the coin is only worth .50 so there is no reason to mess with it. when they say acetone soak they mean 100% acetone. many new folks think nail polish remover is 100% acetone. do not use that as it will leave a residual on the coin.
most of the coins you are posting are average circulated and only have the intrinsic value of the coin itself. I posted a link to PCGS pricing. look through that to find your coin. its very rare that you are going to find any coin of value that was pulled from circulation.
the one posted here would need to be at least MS63 to have any value. this coin has a couple pretty deep scratches which would details the coin and eliminate any value