I'm definitely not an expert at using Marmoset or setting up materials for it, but it looks like you need more reflectivity - also, the surface of the plastic casing should be tinted dark red.
Hi Jonathan! I am currently user of Quixel Suit 2.0, so I definitely will be using this. The main issue with technique that you mention is that normal map creates a ridges on the external side of the glass, but it should be flat. Its also affects only external light and reflections, so the interior reflector will not look…