best method to clean copper artifact

[Moe (fl)]

What is the best way to clean this old spigot?

It is copper/ bronze. It was found at the beach. I tried electrolysis for 3 hrs but didn't do much.

I also tried baking soda. Heard that warm peroxide may help. Any ideas?

Thanks.

 

Amazon Forum Fav 👍

Cry Of The Eagle: History And Legends Of The Cherokee Indians And Their Buried Treasure - Grab it through Amazon!

[Tom_Restorer]

ONLY with a supra sonic scaler like this or with scalpel when the encrustion is not to big (and be carefull! Do not breath the dust!)