Question: What is the main ingredient of the finishing material inside the Dymaxion deployment units?
Sentence (from "Dymaxion deployment unit"): A Dymaxion deployment unit (DDU) is a structure designed in 1940 by Buckminster Fuller consisting of a 20-foot circular hut constructed of corrugated steel looking much like a yurt or the top of a metal silo.
Relevant evidence: No