I've been experimenting with matte paper a lot lately, notably the Moab Lasal paper - which is the only choice for drilled and scored paper for the Lost Luggage Ice 9 portfolio.
First I was quite conservative in saturation and contrast - coming from editing mostly for the web.
But I noticed I had to really up saturation to get good results. I'm still not sure about contrast and only slightly increase it for matte printing.
Oh, and the blacks are quite disappointing - more like dark grays.
What's your best process to print on matte paper?