You are correct. It is the HD helm from flyingsquirrel.
Those floating detail pieces never got bondo'd... Honestly they did not need to be bondo'd. So I pepped them and attached/glued them to the helm. Then I applied the 1st coat of resin. Yes they do stick out enough to see that they are raised pieces. However, I'm not completly happy with them. I plan on gluing thin black foamies to them. Better texture and look.
Good luck with your build!
Thanks for the info! Yeah, I was thinking the same thing, except I was thinking of something a little more solid/harder than foam under the visor. In some of the in-game reference shots, it almost looks like some kind of pleather-like material. What do you think? IDK, I'm probably over-thinking things at this point. Gotta get stuff pepped first, lol.