It’s likely just me, but I don’t understand what problem you might be having. How to redraw a ship hull?
Before going forward, I might check to see that the “surfaces” are really 2d surfaces, and not 3D solids/polysurfaces that aren’t being rendered well because of their repetitive thinness and rendering distance–resulting in surfaces that would have to be rendered in less than a single pixel.
It might be good to check with what was exported, and which settings were used for export/import, before proceeding because…
If some things are only drawn as simple planes, they could each be extruded, perhaps with all being subtracted with the out hull plate, though if the resultant edges are quite close to the hull skin, you might have tolerance issues, because the surfaces may be almost co-planar.
That image may be of the same material, but it appears to be rendered, at least in phong shading, with a directional light source of some kind. As the longitudinal stringers are lighter than the bulkheads.
If that were rendered, it would seem to only need a single gray material, and just a one or two directional or sun-like lighting sources. Rhino’s Default lighting used on some of it’s display modes actually has a few light sources.
To keep nice detail with fine/delicate geometry, as opposed to rendering things with an even aspect ratio, you are likely going to need to render it in high resolution for the final render, with a fair bit of oversampling, that will allow the finer parts to be seen better.