Waterproof my surplus wool pants?

I recently bought some cheap ($20) army surplus wool pants to try out as winter rain & snow hiking pants. I took them out for a rainy Pac NW stroll and a sunny snow hike and they were comfortable but I was surprised by how soaked they got when they got water on them. (Granted I try to avoid getting them wet but stuff happens.) Like a lot of people I've been wearing a lot of wool and I consider it almost a miraculous fabric. I'm a bit disappointed in these pants. Should I waterproof/treat them? If so, how? A lot of my wool stuff is expensive of course but I was hoping I'd found a loophole. I vaguely recall in the distant past that I had a similar pair of surplus wool pants that were magical in the snow. And I have an even vaguer recollection that I had scotchguarded them. I haven't needed to treat any of my other wool but I also haven't been using wool as my outermost layer under wet conditions.