I polish a lot.
Definitely the trigger bar.
I try and lightly smooth the sides of the frame so the bar moves better on all my metal framed guns.
I did put all Cajun parts in it... But I also smooth out things like the sides of the hammer before I drop it in.
I polish the hammer pivot pin, the sear pin.
I also do the rails to slick things up a bit.
Most of what I do is unnecessary
On one of my Omega guns:
My DA sits a 6 pounds 2 ounces.
My SA sits at 2 pounds 11 ounces.
I do prefer the classic action to the Omegas.