Axolotl Copper Garage Door. Straight out of the forge comes our signature line of Axolotl Cast Metals. Metal casting is a manufacturing process that involves pouring molten metal into a mould to create a multidimensional product. The mould contains a hollow cavity of a desired geometrical shape and the fiery molten metal is allowed to cool down to form a solidified part. While our process does not involve heat, it perfectly emulates the truly special texture of metal when it is first cast with fire.