I have a TCP with the satin finish currently.  When I bought it, the store had a large group of the statin slides they couldn't move, so they were heavily discounted.  I carry this routinely so I don't really care what it looks like and quite frankly I would rather have it less "flashy".

I am thinking of having it parkerized, which will make it much darker and also tough.  Has anyone done this before?  Just curious how it turned out.  I might have the barrel done too.