I posted a thread on OpenGameArt [1], requesting help in creating license-OK textures for Trigger. User "farrer" created a script to export UV maps from our 3D models and also posted three examples to the thread. Later he created a sample texture for the Ford car [2].

[1] http://opengameart.org/forumtopic/libre-car-skins-for-trigger-rally-linux-open-source-racing
[2] http://opengameart.org/content/simple-car-texture

I made a few screenshots of the skin in-game [3].

[3] http://omploader.org/vY3VobA

I won't try to convince you to commit this one just yet but I might try in the future if no alternatives arise. ;)

I will keep you updated as new art will be created. :)