I am brand new here and have been checking prior posts but can't find an answer. I hope someone can help me. I recently finished fabricating a fiberglass form of my head so that I could make masks and helmets from fiberglass and/or EVA foam. I covered my fiberglass head in aluminum foil then in duct tape so that I could create a pattern for foam. However the taped patterns are still retaining their 3d curvatures. To flatten them out I have to make a cut into the curves but this will eventually have to be joined back up in the foam which will create more seaming and joining. Is there some way that I can use these patterns and make them flat so that I can transfer them to the foam? I'd appreciate any help that you guys can give.