I've managed to upload the mesh with textures into Unity, damn that was a troublesome, they just behave differently than in Blender so I had to spend hours trying to figure out which numbers for roughness and metalic will be the best. For lighting I've used HDRI with single directional light pointing at the back side of tank turret. Also post processing component. I still don't understand why light behaves like it's all around the tank even tho directional light was supposed to guide it, but, other than that, what do you guys think ?
For clarification, it's clean of edge wears just because it never saw battlefield. Only 1 prototype weas ever produced then scrapped, so my goal was to make it into museum object.