They worked only seven weeks, preparing for the picture. The studio worked nearly a year. The research work alone took months. The making of costumes, more months. And if you don’t think a costume designer like Milo Anderson has his headaches, consider his problem with armor alone: After chain mesh armor was made for various knights and soldiers, the sound department discovered that the noise of the chain mesh in action was like that of a navy raising anchor. Anderson finally devised a realistic-looking substitute out of woven string, sprayed with metal paint.”
“Craig, Carol. “A New Robin Hood,” Motion Picture. Jan. 1938., pg 60.