It is a global material (as in one material fits everything) or is a number of skins? I know Unreal Engine models used to have 3 to 5 'skins' or separate materials from Skin0 through Skin 4 or more, each with a different texture that made up a whole. I found several separate DDS files for each mech so I didn't know.If it's one skin it's easy. If it's several skins then I'd have to make materials that precisely match.