We played around with a number of different materials and finally decided that 1/8" Mackrolon Poly Carbonate was the lightest weight and seemed the toughest. It can be purchased from your local Alro Plastics dealer (or any well equipped plastic dealer) in 48"X120" sheets for about $95 (couple of year old price). If you lay it out correctly, you can get 2 1/2 bodies out of each 10 foot sheet. You can cut it with a fine tooth circular saw and then bend it cold with a brake (finger brakes did not work well). The panels will take a side hit and usually only break when hit hard on the edges. It was not uncommon to run the same panels 3-4 years. Hope this helps and have fun.....
Do you have to run extra bracing with the plastic sides? I'm currently running the Seay fiberglass body and don't need extra bracing to keep it sturdy....
