Getting Precious

I started this picture with the intention of doing a quick drawing to test the use of fixative to add tooth back to the working surface, after having worked on it for a while. The aim being to get better darks with the prisma col-erase pencil. However four day later I am still working on this image and starting to get a bit precious about it. I am no longer sure if I will use the fixative layers technique on this, though it does need a bit more work on the hair which is in danger to becoming cover rendered if I have to keep working the darks in there in the usual way.