I can't say anything about the GMH helmets but the FP helmet I got from class of 1984 was fantastic. it was a cold cast aluminium. What was going on with your GMH?I Stinking Love This Forum!! Such a good read!
When I decided I wanted to build a Boba Fett Costume the first thing I did was purchase the helmet. BIG MISTAKE! I wish I would have known this forum existed before my purchase. I purchased the GMH Cold Cast from Class.of.1984 on ebay and there is a lot of work to be done. However it is not so bad that I want to return it. I would rather take the time and build the skills on this first time helmet and use them for my next build. I am fortunate however that even now after doing the research I accidently picked the GMH and still would have purchased a GMH casting. However it would have been from FP. So...with all that being said, I may start a new thread and post the issues with this "re-cast" and show my progress pictures.
Sent from my SM-N910T