@ReNNie sorry since i m replying you after 2 month.

Can I uv map it with blender (after exported by zmodeler) and use liveries? If yes of should I name the material and the texture for the liveries?

Otherwise can I use something like the crew logo of gta online? Let me explain. Any car in gta5online can have a crew logo, also cars without the liveries. Could I use that function in some way? Thanks.