This short was released during the height of the spy film craze and has numerous sight gags related to those movies.
Mr. X's escape method from Kilimanjaro might have inspired a similar one for James Bond in "The Spy Who Loved Me" in 1977.
The title is based on 'Plaster of Paris', a versatile material that can be used as a wall covering, for molding into statuary, for immobilizing broken bones, etc.