I managed to finish this up yesterday - even though I am fighting an intestinal flu type thing...It was gratifying to get to finally shade and use white chalk. I used a 300 lb arches cold press watercolor paper toned with an india ink wash and loved the surface. I'm so enjoying the slow process of this. Next week we have another two part pose, but I'll be gone the following week so hopefully the teacher will be okay with me finishing it in the one session.
It's interesting that the teacher is only 34 years old- all of us are in our 50s and 60s taking the class!