This painting features a technique I learned in school. The central art is a pencil drawing on mylar. It’s fixed (Maylar does not hold the pencil. It’s always on top. It’s pretty easy to smear and remove. You can erase an entire drawing and recuse the mylar.) I then used thinned oil paint and washed it over the whole drawing. I intentionally wanted the strokes to remain visible.

After it dried a little, I lifted off the paint to reveal highlights. I added some more paint to tint/glaze areas and build them up.

Sandman copyright DC Comics