And the thing with large silver coins like half dollars and silver dollars is that they very easily show wear and/or marks in their larger fields (open spaces without detail) which devalue them quickly in collectors' eyes.
I don't think that mercury will adhere to the steel pennies, just to silver No, mercury sticks to copper too, rubbed some in pennies when i was a kid And everyone worries about mercury God know how much i held in my hands.
