Here's one of the more unusual critters I have ever had to paint.

You can see how I used Reaper Miniatures Pearl White to create a 'sheen' to the skin here:

Name:  Shark 1.jpg
Views: 71
Size:  339.5 KB
Name:  Shark 2.jpg
Views: 64
Size:  385.3 KB
Name:  Shark 3.jpg
Views: 64
Size:  360.2 KB
Name:  Shark 4.jpg
Views: 65
Size:  435.1 KB
Name:  Shark 5.jpg
Views: 63
Size:  420.4 KB