Using filler and paint, spackle a Styrofoam cake mold that comes with a hole in the middle (or make one from scrap pieces), ...

Casting metal parts from 3D-printed plastic or Styrofoam models is all the rage ... casting projects we feature are aluminum in sand molds, though, so it’s refreshing to see a casting project ...

Siegfried Hofmann 3D prints aluminum molds for particle foam - thanks to GROB-WERKE's liquid metal printing process.