Apparently it's been through the usual rigorous Tussauds making process, using the same traditional plaster moulding method as Madame Tussaud herself: sample measurements, clay moulds, wax sculpts ...

Then he spreads on layers of molding plaster. It stiffens quickly, often in 10 or 15 minutes, so he can do multiple coats. But there’s little opportunity to go back and fix details if they don ...