I once talked to a old gunsmith asking about triggerjob for a S&W.
He took a lapping stone, put it 10 inches next to the gun and said:
"This is as near as possible a non gunsmith can bring a stone to a S&W. If you come nearer, unvariably you will take it to touch the contact surfaces of trigger and hammer, and yo will ruin the gun (trigger)"
Ofcourse there are very competent non gunsmiths, but I many guns were ruined by kitchentable tinkering.
I will take the 586 apart, clean it, smoothen the moving surfaces, change springs, but steer clear of trigger/hammer contact surfaces.
this is easy because the trigger is crisp.
Thanks for the nice orange color, it did not help our soccer team against the ruskies though.