Don’t overlook the old handy-dandy mirror on the layout secret: Be sure observers cannot see themselves in the mirror.
Also: Walmart, and most likely your LHS (Local Hardware Store), usually has Krylon Mirror Paint in a spray can – To be sprayed onto the back side of a piece of glass. My LHS will custom-cut a piece of glass, or plexiglass. “Google” the phrase “mirror paint.”
P.S.: Nice pics “ollevon.”