assistance needed

Hey more talented prop builders! I have a"helmet" construction question someone here may be able to assist with. So I bought these "Iron Man"-esque face shields from Amazon as an extra barrier of protection for a plane flight we took over the summer. However, they never arrived in time, were...

Alrighty, hello hello, first post. I'm here for more rather....specialised advice? I have a very ambitious idea for a fursuit project (not something I see is discussed here often but, please keep reading.) where I want the face to open up to reveal a second face. Think, that first moment...