Hmm, not sure, but that skin looks like it just has a red/black gradient from front to back. I think I saw some reflection/skymap mod in these forums that makes a skin look pearlescent, but AFAIK it will also mess up every other skin that isn't made to look pearlescent.
If you want to make a metallic skin, simply first do a layer with a base color, then lighten the areas of the car body that should be lighter with a metallic paintjob.
You could modify the reflection map texture, I think they're only applied to the cars - however it does also effect the glass aswell as the paintwork, and would effect other cars as well.
makes all the cars really shiny, trouble is if you do your skin after installing it you may gte a nasty shock if you find out how it looks on unmodded installs
i'm currently running a similar colour to your screenshot but it can look a bit "girly" (no insult becky) or "nice" in normal lfs