I am new to the site and am hoping to get some wisdom and council regarding cleaning. I found an intriqing coin yesterday that is too small for a quarter to large for a nickel or penny. It is heavilycorroded so that I cannot see any features except milled edge and milled surface rim. I did put it in peroxide to clean it up a bit and that is what exposed the milling. I think it maybe something interesting so before I continue with peroxide, I welcome ides suggestions. Thanks Bob