Thank you for the tip. I spent some time working on this after I saw your post. I used a thin bristle brush (like a really thin bottle brush) and made a dilute vinegar solution and worked on the leather for a while. It is improved now, will check in the sunlight tomorrow. I think the *yuk* factor is the worst part, as from what I have read, the verdigris is not inherently dangerous unless ingested in large amounts, and I'm certainly not planning on that!Have you tried a stiff brush to get the verdigris off? I use almost a nail brush during cleaning and have a mix of dawn water with cleaning vinegar that i use to clean crusty areas. I bought one bag that was the worst I've ever seen and used a salt dawn vinegar water solution to clean it
I ended up having to rinse out the bag again to clean it of the vinegar thoroughly, so I'm basically starting over with the leather moisturizing tomorrow once it dries a bit.