Eraser only.

Here are a few attempts of r/sketchdaily’s eraser challenge.  The challenge was to only use an eraser on a dark surface to create different values with in the picture.  Not surprisingly I made up a couple of faces for the challenge.  They look like they could be ghosts.  It is pretty hard not to be tempted by other tools and adjust the proportions or smooth the gradients along the way.  Shit how do I erase?  Ah the paint tool.  Not in the rules buddy.