To make it truly worthwhile, we need to see a pic of you with FG as the autograph is being done......in your Flash Gordon outfit. 

Definitely need a good pic though to get framed and hang up behind the machine as well as getting a clear coat on the apron.

This, definitely do this. Suit is up to you. 

If they let you that is. Considering you have to pay for a photograph with them im not sure they will let you take one in line, worth a shot though.