I'm building a printer for printing, amongst other things, wax. 
The idea is to do lost wax casting. In order to do the lost was 
casting I needed a few things, one of them being a vacuum table 
to do degassing and casting darw with. I 3d printed some things 
and did some casting. 
The other thing was a investment former, I cast this in silicone,
using a 3d printed mold lined with cornstarch. 
I'll post results as I go.