Iridescent vehicular trim assemblies and multi-shot injection molding methods for making the same

A method of making an iridescent, vehicular trim assembly, comprising:

• molding a polymeric base comprising an exterior surface;
• and
• over-molding an element over at least a portion of the exterior surface,
• wherein the element comprises a polymeric, translucent material and an exterior surface with an integral diffraction grating having a thickness from 250 to 1000 nm and a period from 50 nanometers to 5 microns.

A method of making an iridescent, vehicular trim assembly, comprising:

• molding a polymeric base with a tint;
• forming a plated region over an exterior surface of the base;
• and
• over-molding an element over the plated region,
• wherein the element comprises a polymeric, translucent material and an exterior surface with an integral diffraction grating having a thickness from 250 to 1000 nm and a period from 50 nanometers to 5 microns.