I'm in the process of doing an Avengers Captain America movie costume. I ordered a shield because it's a hell of alot easier than making one. BUT, I bought an adult size (23'' diameter) movie shield made of plastic. The problem I'm having is that it's really flimsy. Is there any way to make it stronger and stiff? Or is it just worth buying a metal one? Are metal ones con-safe?

Thanks.

Does the shield have a lip on the edge so you can wedge in something to brace it from behind?

If not, I would suggest buy a tube of UHU or any bulk solvent glue and apply it like paint, layer by layer on the reverse of the shield.