Man, it's looking sharp!
I'll bet the frame is just gonna take some more dips, since you said the slide became black all of a sudden. I have absolutely no idea what I'm talking about, but I would assume they would naturally take the bluing differently since they are probably different steel...
They look great. Very clean.
It definitely shrinks the market for selling/trading, but I like it when people make things their own, and don't think they are "stuck" with only one option (in this case, the factory Glock grip).