Step 5: Form the eyes
Cover with petroleum jelly.
Soak the cheesecloth in glue, and form over the ping pong balls.
Leave enough cheesecloth to sort of puddle around the side of the ball. This will give you a flange to glue to the inside of the mask.
Let dry thoroughly.
Cut holes out of the thermoplastic where you want the eyes to go.
Fit and glue in the eyes from the back of the mask.
Paint mask and hat with base coat of white paint (or gesso if you already have it).
I used some thin rope around the crown of the hat to give it some extra texture.