I am investigating the use of verdigris on paper. Ancient manuscripts used verdigris for colouring illuminations. These papers are stained with tea first, and then with verdigris. I know that verdigris will continue to degrade the paper (as with rust). We will see. I have coated these with wax which may inhibit degradation.
My other investigation this week was the effect of coloured wax on paint colour cards. Lots of potential there for combinations of colour. The cards are from Reverse Garbage in Marrickville.