Constantinopolis Question??

From @tenbobbit, a rather excellent example from Lyons. I'm working on getting the green off.

 

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I have wanted to do the same thing, but lack the expertise.
What method do you recommend ?

 

Right now I have what’s called a fiberglass pencil that seems to be relatively effective in removing it. It seems like short of using chemicals the only way is mechanical

 

I wouldn't take all the green off. I think it's rather nice.

Part of the patina on a very old coin.

But that's just me.

I collected these a while back.

 

Good thread, enjoyable on a nice Saturday morning in the hills.

Here is mine, 17mm. Antioch?, courtesy @Victor_Clark

 

This one just arrived, courtesy of @John Anthony :

Constantine I, AD 307-337.
Roman billon centenionalis, 2.89 g, 19.5 mm, 12 h.
Cyzicus, AD 331, 333-34.
Obv: CONSTAN-TINOPOLI, mantled bust of Constantinopolis left, wearing pearl-diademed helmet and holding inverted spear.
Rev: Victory, standing left on prow, holding spear in right hand and shield in left hand; in exergue, SMKB.
Refs: RIC 93; Cohen 21; RCV 16477; LRBC I 1234.

 

Thessalonica -




Lovely teal patina, but quite scratched.