How do I decorate my car in gaia?

go 2 'car' under 'my gaia'. then u should come 2 a screen where u can decorate ur car. at the bottom there should be a on that says 'trade in' click on it and u can get the spaceship, a.k.a. UFO. the ufo's look rly awesome if u have the right parts. like mine ^ ^ if u wanna see it, my username is clarity17