Could anyone give me some advice on MDF.

I've got some moisture-resistant (green stuff) MDF panels in my bathroom.
They're to get painted ultimately, but I don't know how to best prepare them
first.

diluted PVA? International MDF Primer?

Because the MDF itself is moisture-resistant, does this affect how I prime
it?

Would I be better to use oil-based or water-based primers.

If anyone could give me some advice, I'd be very grateful.

Thanks in advance.

Eno