I pulled out an old window that I started sketching a design on a while back, but committed to finishing it this week. This is an old window I pulled from a stack in my studio. Painting on windows is an interesting process, because everything is painted in reverse.
So if you can imagine, the stars are painted first. Then the detail of the waves, THENNNN lots and lots of layers of colorful goodness. These take a few days to complete (at least) with all of the layers, but when they are done, you can actually clean the glass when they are hanging on a wall!