Was watching WCC the other night when they were making the Mario karts. I haven’t seen this mentioned anywhere on the net. They machined styro-foam (cheap stuff from HD) and then covered it with tin foil, coated with epoxy and woven glass to make a one part run. Obviously these were only for looks and took some sanding after demold with some body filler but thought I would mention it on here incase anyone had a use for it.
Yeah I’ve heard of foam and foil. I believe they also did another car using foam and foil
I’ve seen people make quick molds to make speaker boxes that way. It works well for odd jobs.