Ok so I'm a little stuck. I'm trying to make a late 60's early 70's style rally car and I need some advice on how I should go next, what I should lose, what I should keep etc. Also some sponsor ideas would be nice.
If you think it looks too much of a "clown car", try changing slightly the colors. Replace on of the colors by a white. EX: Red/white/yellow, or Red/blue/white, or White/blue/yellow. It would still give a retro-like style, and maybe give more style and less over-coloring.