Need Advice w/ molding!

Folding Giant

New Member
Hi all.
I'm in the process of planning out a Bioshock Rosie Big Daddy build.
It will be my first build involving molding part of the costume.
My question is this: If I sculpt the helmet out of clay, will molding it with silicone and fiberglass mess up the clay?
If so do you have any suggestions as to how I should go about building the helmet? I've looked for pepakura of the helmet but I couldn't find anything downloadable.
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