I forget how they introduced plaster into wraps when being watched?

I can only imagine that the wraps themselves were slightly damp and already run through powdered plaster before being brought out?

Or was there a plate of already hardened plaster slipped in between the wraps?

The only other question is did he know or was it his corner men siding their bets that way?
A lie detector test would be great one day if he has the balls to sit one.