Sadly there are constraints when using sculpey for a large scale piece. It can be made pretty strong but if rolled too thin it would become too brittle.
Just found this brilliant piece and wonder if it was finished.
Love to see it in paint.
That's a tad mean of you Kevin .... just one photo.
For an all-round view of this magnificent bust you need to go to the finished article:-
https://www.planetfigure.com/threads/lt-paulee-6me-hussards-1813-1-5-original.78019/
Cheers,
Andrew