The LDraw.org Colour Definition Language Extension allows various finishes to be declared for a color (like chrome, metallic, etc.). The LDConfig.ldr defines all the official LEGO colors, and uses tags to have them have the right flags set. However, it's up to a rendering program to take action based on those flags.
LDView modifies the specular highlight settings for some of the flags (like rubber and chrome), but this is only visible if specular highlight is enabled in LDView, and it doesn't actually make those colors shiny in the traditional since, because LDView doesn't support reflections.
Since a specific color code is used, though, that code can be defined to have the desired properties in POV-Ray, so if you export to POV-Ray, it's possible to get things set up so that the colors behave approximately like desired.
LDView modifies the specular highlight settings for some of the flags (like rubber and chrome), but this is only visible if specular highlight is enabled in LDView, and it doesn't actually make those colors shiny in the traditional since, because LDView doesn't support reflections.
Since a specific color code is used, though, that code can be defined to have the desired properties in POV-Ray, so if you export to POV-Ray, it's possible to get things set up so that the colors behave approximately like desired.