As I said before, I found it hard to tell from the jpeg which parts were bent to be smooth curves, and which jagged corners. Personally I think the jagged bits look a bit 'graffiti' like, and I prefer the smooth curves. Using a blueprint of a hatchback and Dekays design as a basis, I've modified it to a smooth design as shown here, and used lighter colours as suggested.
The design could be either be 'solid' or 'hollow'
Or even a combination. This has a hollow design in blue overlaid on the solid design in PaintShop Pro. I could even make solid characters as I attempted before.
It can be shown at any kind of angle, can be any colour, have any texture, have any colour reflection, have any colour background and the lighting can be changed (spotlights etc), so if you have any preference, please say so...
Personally I'm much happier with these than my previous attempts, but what do you think, comments or suggestions please...