I have also made several "lowtech" casting experiments. including using something similar to what you mention there. I used hot plastic melted in our oven pushed into molds made from milliput
I have also made several "lowtech" casting experiments. including using something similar to what you mention there. I used hot plastic melted in our oven pushed into molds made from milliput
RE: Investment casting. Redoing a millennia old production process.