Help – How to Cover the Back of Joined Pieces?

by Kathy Bartolameolli.
(USA)

I have joined some costume pieces using wire and glue. The front looks great but I would like the back to look finished. How can I cover or finish the back neatly?

This is the front of the necklace:

Front of necklace

 
This is the back of the necklace. What can I do or use to cover the back?

Back that needs help

Kathy Bartolameolli