you've got to post a tutorial for this! i want to do one up to give as a christmas gift to the little boba i made for halloweenI did my sons jet pack the same way and it turned out okay. Foam + fiberglass kit + bondo. It was ALOT of sanding though. (yes, I know its not accurate... lol...) I can't seem to find the pic, but it looked exactly like that helmet of yours. Like a bondo birthday cake.