How do I clean my Roman Silver Coin?

[mrperson101]

Hello viewers, I am new to this hobby and I really would like some help with my problem thanks.
I have a roman silver coin that is very heavily encrusted with a green patina. Few details are visible, I want to be able to see the legend and details so I can identify the coin, but I am not sure how to do this without damaging the patina, and the coins historic value.
How do I clean my coin properly without damaging it in any way?

The attached pictures are not high quality, and more details are visible on the actual coin but they are the best I could get, sorry. The actual coin has some flaking in the patina, this is because was too rough to it to begin with.

Thank for your time

[areich]

If this was silver, cleaning would be easy but it looks like a plated bronze core of an ancient forgery where most of the silver plating is gone. Maybe even a fake 'serratus' (Rebublican denarius with serrated edges), judging by the edges. This coin looks like it has been in oil for a while, which is never a good idea.

[mrperson101]

Thank you very much for that information. Is there any safe way to tell for sure if the coin is a fourre? Also if it helps this coin was found at the roman forum in Rome on the ground. Thanks