Lego model of my Hypercar concept sketches built as a canvas for adapting livery designs onto a physical three-dimensional form.
One key downside to not doing real livery work is that I don't get to see what the designs would look like in real-world three dimensional form. Drawings and renderings are just approximations, scale, light, movement and distance all play into how something looks in person.
I designed and built a 1/24-ish scale model of my f24 concept (the sketches for which were also the basis for the f94 cinema4d project) and used that to scale and rework a few of my livery projects. The results are quite satisfying.