Hell, you can pour into sand. I helped melt a lot of things in college but I try not to give casting advice on the internet because it's dangerous and I'm not an expert on the finer points. Wanna see an arrogant graduate student cause small explosions inside a large mold filmed with a potato?
My professor was a "badass biker" who wanted to kill that guy for that stunt. And other things. I can hear him at the end. Even badass bikers sometimes lay awake at night worrying about a student getting a third degree burn and shutting down every iron foundry program in the country I will check out your video when I get a chance. I like it when I force the YouTube algorithm to show me stuff like that for like a week
Yeah, foundry guys and machine shop guys have the stories that you don't wanna hear too much. half the machine shop stuff you can't watch because it trips Youtube's gore filter. Jewelers can't really compete but they can try; the kilns at my program didn't have peep holes because my instructor had someone in her grad program who peered through it while she shut the door, thereby puffing a couple liters of 1400 degree air right at her cornea. Autoplay on myfordboy is like a japanese meditation.