Thanks CM - I know that is why I have never done so - I thought it might look better in general on the Obverse. I have read that an acetone bath - so long as you don't rub it with something is not considered a "cleaned" coin? I will leave it as is at least for now.
Congrats as well. I've found only two myself, they're not as easy to find as the 2000. Yours looks to be in pretty good condition, you might try to seal it to keep it from rotting any more, may extend its life.