You can do this with characters, too. While the meshes you end up exporting seem to be physically intact, in my experiments with this method, they lose both their smoothing groups and UV coordinates.
I don't know if this is always the case, but I tried it with scabbards. When I reimported them and applied the textures, the meshes just ended up showing flat colors.
Also, if you're in the asset browser and right-click on a loaded mesh, it will give you the option to export it. This feature doesn't seem to be enabled though, since clicking the 'export' button does absolutely nothing

Well, it works on .xbm textures, but that's about it.