... What!? Who offers 3D printed parts that size? Am I to assume he had molds printed and the foundry cast the parts? If so what were the molds printed in? Were they reusable? I just can't imagine a process for doing this that isn't insanely expensive... and he made TWO? I'd love to know more about the process used.
George Miller owns his own FDM 3D-printed, a Stratasys
Dimension machine. George 3D-printed the bottom half of one table (or at least one third of that) on his machine in blocks, which he glued together. The metal foundry that he used made a type-of silicone mold around that bottom half and removed the 3D-printed original. They pour hot metal (I believe bronze) in the mold, let it cool down for a bit, keep the part upside down so some of the still liquid metal pours out. The result is a half-table that is hollow inside. The foundry repeated the casting process another three times. The two pairs of table halves were welded together, one upside-down onto the other. After that, there was much sanding, polishing and buffing. A metal patina coating was applied to give the table its current looks.
Note that there may be errors in this description, as I am repeating what George heard from the foundry. Neither of us has seen the whole process. You are correct in assuming that the whole process was expensive. The result is gorgeous, as you could see.