Fine steel wool is a good place for me to start. Staying away from a Dremel for now.Fine steel wool and oil is what I use for surface rust/ discoloration.
Dremel?
It's a newer 686 so the trigger is MIM.Depends on which trigger your's has. Is it color case hardened?
Post a pic of it.
The MIM parts are hardened to approximately same depth as the old forged parts.You can polish it up, but it will take a quite a bit of work. Get a tub of polish and go to work. The surface hardness is pretty thin on mim, so go easy on contact surfaces.
This is the polish I have on hand.
View attachment 163960
That's good to hear. I have only polished up a couple MIM parts and one definitely wore faster than it should have. Probably just a bad one from the start then. Probably don't need to worry about it then.The MIM parts are hardened to approximately same depth as the old forged parts.