I really do like some of David Mach's sculptures, Have you seen them? They are quite fantastic. 
They are stunning. His work is based on mass-produced objects in flowing assemblages
Yes I just love that about him, He has some gigantic sculptures as well. How old is David anyways? 
He was born on March 18, 1956 in Scotland
Oh wow so hes not too old, Do you have a favorite sculpture by David? 
Polaris was one of his early influential sculptures. It was outside the Royal Festival Hall in London in 1983.
Oh yes I remember that one! That was truly a fascinating piece indeed. Do you know if David has sold any of his works? And how can I buy one? 
I'm not sure, I've mainly seen his work exhibited in public spaces
Oh ok, Yeah he sure does love to show off his works for sure, What is his biggest sculpture anyways? I forget. 
Well "Polaris" was a lifesize replica of a Polaris submarine. It was constructed of 6000 car tires.