Rob,
That's great about the Parkerizing solution being reused.
Fifteen years ago or more, it was a "one-shot" bath (dip) and then down the drain.
For many of our customers, we simply (glass) bead blasted the entire knife, which saved time on masking the knife.
The result looked very much like your photos on the handle and hilt, The blade was the same texture but gray color. Of course, the knife had to be resharpened.
I'm very proud that I sold a Model 14 to a MSG in the 7th SFG(A) about 5 years ago who was awarded the Silver Star for action in Iraq. He told me it got down to "hand to hand". In his hand was the model 14.
BTW, is that bucket the one I lent to you after the 2010 Blade Show?
It was a great footstool.
Maybe it wasn't. Can't remember.