Hi Mat10x, sorry for my late response.
That's how I do it: - export the Moi3D model to Obj, limiting the resolution of the small details - in 3DCOAT I use Automatic Unwrap, then I texture and I export the model always in Obj and I use the setting PBR metalness - in Blender I import the model in Obj, I use the Node Principled, Base Color for the Albedo texture, Metallic for the metalness texture, Roughtness for the Roughtness texture, Normal for the normal texture with the Bump knot for the relief. For rendering I use Eevee or Cycles with HDRI. I hope that answers your question. Do not hesitate if you have any other question.
Sorry for the translation, I'm French and as you know the French speaks bad English;)

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