LostDutchman => wow, what a great effort in trying to reveil the coin's tootsie-pop center!! (bravo) ... yup, 100% full points to you, for I personally would not have the patience to clean those crusty ol' ancients coins (I'm sure that I'd be too impatient and I'd end-up ruining any value and I'm sure I'd also end-up doin' a bit of tooling to try and recover my horrible mistakes!!) anyway ... for the record, I think they look kinda cool the way that they are in their natural state ... I might even try to make an artsy-display with those wonderful crusty ol' coins ... ... either way, brother => good luck with your cool hobby