Update:
Tumbled with a water and CLR solution for about an hour and took the staining right off. I think it was a combination. Of too much oxide and not enough water. Thanks for your input
I’ve been having issues with staining after tumbling, seems like mostly inside the bottle. I’ve backed way off on the polish and now instead of green stain I’m getting orange. I’m thinking it’s oxidation off the copper? Has anyone ran into this and found a solution?
Thanks
-Jake