Can you use one of these packs to make a form for custom fiberglass pods? This would keep all fiberglass smells and mess out ofnyour trunk. Basically press to break the chemicals in the bag, shake to is and press against trunk area where you want the fiberglass sub enclosure. Pull form from trunk and fiberglass the mold for few layers, seperate and start glassingminside of shell to desired thickness. Anyone tried this or think its worth pursuing?