When I did my Dart 3 liters of Spies Hecker was over $800
On the Duster we used Diamont, I'm over $4000 in just material cost. Expoxy, 2K, Base, Clear, Hardeners, Actuvators, Tape, paper, tac cloths, respirator, sand paper, Mixing sticks, mixing cups. Its a much longer list then most people think.