And this past weekend I made some enamelling experiments I wanted to try for some time:
Graphite over enamel. Hardness of the pencil doesn’t seem to have any importance (here: 8B, 4H, 2B)
Watercolor over enamel
The watercolor colors that seemed more succesful (of course, the earths)
All applied over a matte surface.
The do not peel off in any way, but seem well fixed to the enamel. The watercolors have a rough (some more than others) and matte surface. The graphite is quite shiny.