Replying to Best tech-wash / waterproofing?

What is the best tech wash or way to waterproof ski outerwear. I recently picked up saga ivory pants and a lobster jacket, and would like to increase the waterproofness of both of them. I have heard things like nikwax are good options, but I want something that will be able to hold up to an average pnw day (I have some better stuff for rain, but I like the look of saga more). Anybody have any experiences with this?