Final train car rendered in Substance Painter.
Screen capture from the car in Unity to ensure the textures are looking good.
This is a very basic version rendered in Substance Painter just after baking the high poly to the low poly.
UVs stacked to make the most use of the 0 to 1 space.
Based on the references below and the project brief I drew up the concept so my client and I were in agreement as to what should be modeled.
A snapshot of the PureRef board, my primary reference is this style of coaster.