The trigger is horrible. Install a spring kit and you will believe.
The first Ruger revolver I tried with a spring kit ruined me forever.
That appears to be a mark on the cylinder, not wear. Some revolvers do this.
From your googles:
"The Wrangler frame is machined from cast aluminum alloy, which is both lightweight and easy to manufacture. The barrel and cylinder are made from steel, of course, but the grip frame is cast from a zinc alloy."
I will probably buy one at some point.