What might prevent metal “blowing” and other forms of shaping from working if gravity was not a factor? Let’s handwave-ignore the extremes of temperature as it relates to techniques and the present primitive space habitats and craft.
Is it possible to suspend a pool of molten metal, with a tube inside, spin while adding a gas to shape a container, and form more complex shapes through additional heat cycles in a repeatable process?
You can work glass and plastic the way you can because at a certain temperature range their plasticity and viscosity are conducive to working them in that manner.
Iron has plasticity at a temperature, but lacks the viscosity until it gets too hot to have the plasticity needed. If you had a molten blob of iron in space and tried to inflate it, the material would get a hole blown in the side instead of inflating and stretching out because the working properties aren’t right.
