Considering Micheal's advice I attach a video that can help, this simplifies the work later and you can reconstruct the surfaces in Moi3D.
Here is the video timelapse and can help, of course I recommend using Blender, but you can find other applications to do this.



Here a course on Blender for car design

https://www.blendermarket.com/products/3d-cars-inside-and-out-in-blender


Greetings