Taking a lot of inspiration from the Josan Gonzalez's Neon Rising Art Book I bought last year. Here is a version of the Back the the Future mobile roughly based on BTTF2 with some upgrades!!!

I used a base mesh downloaded from the internet, remodelled the wheels and engine section and then exported it as a Vector line image. All of the colouring and detailing is done in Photoshop/iPad and Illustrator.