I just completed this black Corian directory for a local Allstate Insurance agency. This one included several gold inserts so my customer can change the directory to suit.
Lots of polishing time which is why I rarely use black Corian. You can see from the reflection from the shop lights this one is close to a mirror finish.
I have not been able to get a picture of this directory after it was installed yet. The is so much light in the foyer where it was installed I will have to find a suitable time of day and try again.