Just finished doing my first trigger job, on my new Gen3 G17. Smoothed out greatly,and much easier than I thought. I had never taken any of my Glocks apart like that before, turned out to be super easy.
I just used some Brasso Multipurpose polish and the edge of a towel. No Dremels,just hand power. Took about an hour, about 3-4 minutes per contact point.
Now the only issue is I know how easy they are to tear apart, I'm already plotting what parts to purchase!