Jenny Scobel is an artist working with glazes of color thinly painted above an underdrawing. In these works the drawing really shows through quite strongly but as you can see in the Albrecht Durer pieces below, his paint mostly cover overs the underdrawing.
The above 3 process shots I can no longer find the source of online. I have them labeled as Jon Gomez. If anyone has a link please let me know and I'll link to it here.