Everyone has great points and I've tested many methods on my numerous Lincoln's with a fair amount better for my efforts . But I have recovered IH's that actually were completely covered in light green patina and showed perfect details and looked to be in excellent condition except for the green , they even had a gloss to them . However , my father-in-law tried to clean some he had the looked the same and after the green was gone so were a lot of the details that showed before . The best way is anyone's guess and I think it's up to the finder and they shouldn't be encouraged to clean their find's but they also shouldn't be scolded for it either . It's up to them . I think those he cleaned look fine and although they lost some of their value being cleaned , they are not scarce and worth a ton of cash . Now if it was done to a 1877 IH then that would be a problem .... IMHO , Woodstock
Yes I love finding nice shiny green indians with sharp detail.
Why would anyone want to remove it ?
early wheats 1930's & back come out "greening" but not quite as green.
I wish they would.