A contrasting pin stripe around the darker colour would have brought it out better.
I would buy a large ( as large as you can get ) piece of thin white card. Also try using flash when you take the shot, you get a bit of hotspot where it's reflected in the body shell but it will bring the colours out, failing that shoot outside in the sun, you might have to wait until one day in late may though and then it'll be another year before you can take another good shot so I'd rely on the flash
