This is a good question and I hope some has an answer. I once found a place that sells 100% Acrylic hats for $10.00 a dozen. Did not realize they were Acrylic when I bought them but I tried to press a Dollar sign on it for a customer using a cap press and it scorched the hat. It's like it started melting or something.

Since then I just packed them up and sat them to the side but if I could use them It would be really great.
Hope someone has an answer.
Katrina