We etched our designs into styrofoam plates with a pencil. Colored over the plates with oil pastels and burnished with a paper towel. There you have the scrimshaw effect.
Printmaking came into play the following week as we put a bit of paint of top (we used purple) and burnished it in with a napkin. We then placed a sheet of newsprint on top, burnished and pulled the print. The pulled prints could then be reworked if desired.