Lotus Elan and Lotus Elan Plus 2 Forums

I wonder if they make one, or suitable media for general 3D printers, which print in Wax.

One could then print a wax prototype and use it to make a mould using the 'lost wax' method and then use the mould to make the object in metal.

If you just want to make simple solid parts check out silicone molds
https://www.youtube.com/watch?v=R3HvPuvvuDQ
You can find kits for around US$30 on Amazon