This actually happened a while ago but I just got around to posting the video. I used a small cast iron skillet as a mold to make an aluminum skillet from melted-down vacuum cleaner parts. Amazing! A cast vacuum cleaner from the 1960s becomes a fully functional skillet useful for camping or making eggs.
I thought it would be helpful to explain how to do metal casting rather than only showing the pouring of the molten aluminum, so there are tips throughout the video aimed at those beginning casting.