For this demonstration we used 5.5 lbs/ cu. ft airex foam but any brand of closed-cell structural foam compatible with epoxy will work. the foam can be found at most online and local boatbuilding. A typical automobile body will require about $900 worth of plywood, urethane foam, and standard polyester fiberglass (the same material used to build boats, kit cars, and production corvettes). the body is first built of inexpensive foam boardstock (typically, 4 x 8 foot panels of 1-inch thick material) cemented in place over station formers.. Alibaba.com offers 493 fiber foam boat products. about 1% of these are rowing boats. a wide variety of fiber foam boat options are available to you, such as fiberglass, carbon fiber..
M60 patton tank from foam plug to glass.. Foam where the hull will have solid fiberglass must be beveled and the corner radiused so the fiberglass materials will not lift and cause air bubbles. this can be done with a knife, rasp, and by sanding..
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