What paint for window's wood frame in bathroom

[fraccalo]

 

Hi all,
I have a PVC window in my bathroom, and I'd need to paint the wood frame around it (see picture). I am now sanding the old paint away (as it was heavily exfoliating), and I am wondering what kind of paint/products I should use for painting it.
Note that half of this frame is right above the bathtub/shower, which means it always gets some water on it.
Thanks 

[PeterW]

Decent oil based gloss or satinwood. Primer, undercoat and then 2 coats of gloss to finish then wait 5-7 days before water gets on it.