You can try to use this combination in Surface Material:

Object Color: Pure White
Highlight Color: Grey 50% (more near of white, more bright)
Ambient Color: Pure Black
Reflective Color: Pure White
Highlight Size: 50%
no more

This combination give a oiled-skin look, but its a beginning to obtain your wet skin

If you want wet skin textures in origin, Miss April for V3 by Morris have a very good look with thousands of little drops

CASETTE
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"Poser isn't a SOFTWARE... it's a RELIGION!"