Update - 23 Nov 2020
I opened the model in Substance Painter and applied some fill layers and smart materials to explore the model and plan how I'm going to texture it. After looking at the reference images I found earlier, I plan on making a surf style van so the artwork on the sides is going to be themed around that.
Update - 20 Nov 2020
I have found a few images that I would like to use as inspiration. I've decided to try and make a hippie style van with some detailed artwork on the sides.