- Apr 5, 2013
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Foam board will bend after a while. I would try Luan, or at Least Balsa wood, covered with either epoxy or clear coat, so it doesn't absorb moisture. It really depends where you put the parts to prevent warping over time that is important, and determines why kind of material you could use. Aluminum flashing on the outside of the cockpit, with the paper template glued over it. Now that would never warp. 
