I recently got into chip carving and have carved a number of line drawings of animals, letters, etc. After carving the lines, I apply several fine coats of clear spray lacquer, let it dry, then apply a latex paint to the lines, wipe off the excess using rubbing alcohol to clean it up, let that dry, then apply a couple more coats of lacquer on top of the latex paint.

I'm now trying to carve a line drawing I made of my daughters face where I trace a line along the main features. However, there are a number of, let's call them shady areas, such as where her hair is between/along her cheek & ear, or along her forehead. I can't simply make a line that would represent this "shaded" area. Does anyone have a suggestion how to do this, or is there a carving tool that could "scrape" an area to represent her hair? If so I could lightly color the shaded area in a similar manner. I was thinking of using a narrow chisel, but there must be a better way???

I'd appreciate any and all suggestions.