Do what I do with most of my scale lids. Look up the real cars on the internet to get some ideas of how they looked in one color or two tone, chrome bumpers or matching paint, trim, stock colors etc. It gets your creative juices flowing.
I Actually Have A 1973 Ford Bronco Hpi Racing Body And I Think I'm Going To Try My Hardest To Make It Look Simple And Just Like What They Looked Like Stock. And I Also Agree With Rolex.
I have a similar body i9n 1/18th scale from Losi that I'm working on. Well, Actually I have two of them. I have one painted as a tribute to another truck that I liked and one is going to be a stock paint jib.
I just picked up the same lid for my new SCX-10 that is on the way. I think I'll do a stock style paint job on it. It looks like a great lid with lots of detail.