Thank you, Gamera! I appreciate your comments!
The hair was in two halves, a thin front piece with the two front curls and the curl over the face, and then the large part of the rear hair and ears, so that was the only difficult masking. The hair had to be glued together over the head and face after painting the face, so I only had to mask the face and neck to putty, sand and repaint.
These kits are fun, but there is always one painful part like that! I built this Sol Angel Rebirth a few years ago, and it had the same problem; the left arm has to be attached before the right arm can be attached, but because of the overlapped pieces it was necessary to prepaint everything, then attach the arm, putty and sand and then repaint it.. It's always painful to take sandpaper to the finished paint!