Yes, you could.
Over here there are many pure PE kits out consisting of planes, cars, trains, insects, Dinosaurs they vary from skinned to the internals only.
Said that most of them are rather small scale (HO and similar).
Here are some samples that I could easily find:
http://www.hlj.com/images/unf/unf51021.jpg
http://www.hlj.com/images/unf/unf54342.gif
http://www.hlj.com/images/tys/tys91787.gif