Odd glitches / reflections on rendered models


I’m using Cycles in Blender 2.8 for rendering, but I have weird problems with some imported 3d models. For instance, here’s a model that keeps being reflective:

The node setup for this material (front panels) is pretty simple:

Blend file:

Delete the duplicate objects with nonsensical materials.

Thank you! There was a bug in importer script that caused meshes duplication.