So... I completed the treatment per Atsko's instructions today. I washed everything first in their detergent, then liberally applied UV Killer while everything was damp, and then air dried. In UV light there is a slight difference from the original. Looks like the super-white has been replaced with a slight bluish color. Guess it's not the night and day difference I was hoping for though and I'm kind of bummed. Still, the kids bought the set for me so I'm going to keep them and see if I can kill a deer while wearing them.
For reference, I forgot to apply the UV Killer to the very bottom of the right jacket pocket (under the crease) and you can see how white it still is.
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