This is the head of Socrates was cast in epoxy. The mold was cast from a magnet onto a refrigerator.
The original head is placed in a container and filled with silicone.
After two hours, the mold is removed from the container. And the original head is pulled out of the form.
The epoxy resin with the hardener is mixed and poured into the mold.
After the resin hardens, the figure is taken out and ground.
Everything is ready, quick and easy. For illumination, you can place the LED back on the figures.