Tesoro Forum

I have good luck soaking the coin in hydrogen peroxide for a few minutes at a time until it looks good.
First, heat the peroxide in a small plastic container for about 30 seconds and then drop the coin in it.
It will start to fizz and I usually check it every couple of minutes or so.
I usually rinse it each time with water and a toothbrush to see if the crud is loose, so I don't have to keep soaking it.
Yours looks like it is good shape except for a couple of spots and it shouldn't take much to get it cleaned up.
I like to get mine to where the dirt is mostly gone, but some of the patina is still left.. this seems to retain more detail this way.
Good luck,
Felix

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DO NOT DO THE HYDROGEN PEROXIDE"" When i did this it will not leave any mark of the coin. Looks like a round slug. Just soak it in soap and water, and let it go or you will have nothing left.