Had a go at the roof of the bay window today and thought it came out pretty good. I searched online for different verdigris effects and this is a combination of what I found. Some people like more green, some more turquoise. Have fun and do your own thing!
Step 1, Several coats of Craftsmart Metallic Bronze
Step 2, Sponge painted with Craftsmart Campground
Step 3, Sponge painted with Americana Seaglass
Step 4, Sponge painted with FolkArt Metallic Antique Copper
Step 5, Sponge painted with Craftsmart Ocean Breeze
Step 6, A wash of thinned white dabbed off with a paper towel
Have more ideas for finishing the rest of the bay so will keep the pics coming.