Asteroids contain a whole bunch of common metals, especially iron. That's the point of processing them in space, since Earth already has enough of iron.That is simply not true and I am telling you that. Metals can be fabricated to have many multiple thin layers with space in between them. This may be better for micrometeorite protection because the impact usually liquifies the object that is crashing into the space station. The thin layer with gaps may ensure minimum damage because the liquified meteorite will not have the cohesion after the first few layers to puncture the other layers. This is something that simply can't be done with rock.
"And if the people raise a great howl against my barbarity and cruelty, I will answer that war is war and not popularity seeking. If they want peace, they and their relatives must stop the war." - William Tecumseh Sherman
“The market, like the Lord, helps those who help themselves. But unlike the Lord, the market does not forgive those who know not what they do.” - Warren Buffett
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