Donna used a heavy weight Fabiano 300 hot press watercolor paper, I used Rives100% rag watercolor paper and have ordered some Fabiano. It fascinating just how much the WHITE affects the luminosity.
I mounted my paper with linco adhesive (archival, reversible, acid free) and then mixed my surface.
Recipe: 1 cup gesso, 1/4 cup marble dust plus 1TB, 1/4 cup water
I guess i will roll with what happens.