(Click for larger.) Both of these scrap piles are aluminized — one with nano (80 nm), and one with micron (30 µm). The reasons we want to use nanometric metals should be readily apparent. The nano scraps are from a new mix that I tried with a modified binder system, and instead of the stuff being like dry sand, it was like clay, making it viable for casting and firing in a motor. Maybe one day, when the price comes down a bit!