I just finished watching mythbusters and they were doing tests (mainly impact tests) of spray on bedliner. It made me wonder if anyone's tried using the material for casting. If I were back in the states I'd try. Watching a youtube vid it seems to be about 25 to 30 dollars for a gallon. It seems to be a lot more durable then other urethane resins I've used and might make for more solid repro castings. The other alt is some form of abs resin found in auto stores on the cheap. These are used for fiberglass and dash repairs. I'm not sure how solid it is because it is a two part resin that uses a liquid solvent instead of heat to create the liquid form. Anyway, just a couple ideas. I'm really curious about the spray on bedliner though.