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Go look at homebuilt airplane sites. The do all kinds of fiberglass and graphite fiber layups. Many techniques work without having to make female molds.
A quick and easy way is to layup fiberglass on a styrofoam (polystyrene) or urethane foam core. I used the urethane foam core to make an engine cover for a boat once. 1" urethane, 1 layer of glass, and you could stand on it.
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