Pair if Urns - Age, and how to even out patina?

Can anyone give me some information about these pair of Art & Crafts? / Art Noveau urns?

As you can see from the pictures, one urn is a dark grey colour with some small flashes of copper/bronze colour here and there, and the handles have large areas of bare copper/bronze?

The second urn on the right is covered in a heavy green/ verdigris? patina, and the handles have large areas of bare copper/bronze.

Really appreciate any information on the following:

• Age and provenance?

• Are they copper or bronze, or what material?

• How should these urns be cleaned or treated to even out the patina between them both?

Thank you

 

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I'd take a rag, dampen it with white vinegar, and rub the green one if removing the "greenies" is considered desirable. It may not be. You can't restore the patina, the green corrosion means it's already gone, but it might look happier.

 

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