no wonderfinish is a Tanfoglio term. It is suppose to be a heat treatment of some sort that provides corrosion resistance, not a plating or paint finish.
the slide is exactly like any steel slide that is sand blasted, then hard chrome finish, similar to matt stainless.
And the frame since it is alloy they did Cerakote which is a ceramic based paint finish in silver.
It does have a slight two tone look to it.
While you are waiting on your gun to come in go to my thread on smoothing the C100, there are a lot of pictures in there so it should give you a better idea on the finish.