scope:

This specification covers the performance re-quirements for both rigid and flexible decorative ornamentation with urethane on the top apparent surface. The substrate material may be metal or plastic, nonlaminated construction. (Parts made of laminated construction are covered by performance specification GM3620M.) The substrate may be painted, integrally colored or otherwise decorated to match styling requirements. The urethane coating may be clear, pigmented, transparent or opaque. For Interiors, the urethane may be a thin film obtained by painting, roller coating, etc. For Interiors or Exteriors, the urethane may be a thick coating (lens), generally  >400 μm (16 mils). obtained by pouring. The periphery of a poured urethane lens may be rounded (formed by the meniscus of urethane poured onto the individual part) or sharp (formed by die cutting parts from a large, flat sheet that had urethane poured onto it). Construction and appearance requirements shall be described on the part drawing.