I went a slightly different route than the oft-touted "ramp and throat polish" solution. Yes, the hammer spring was changed out to factory P225-weight (what a chore
that was!), but taking my time, I smoothed by hand with a water stone most of the bearing surfaces throughout the entire pistol (excluding critical points like the sear and safety contacts). Not mirror-polishing, but enough to iron out any kind of grittiness and get it to a butter-like feel. Also did some exterior barrel work, too, fitting the chamber a little more snugly to the ejection port for example. When it came time to give the ramp and throat some attention, I used nothing more than a drop or two of Flitz on a q-tip, light pressure, 5-10 minutes of swabbing, a blast of carb cleaner, and a dusting of Moly lube rubbed in with the other side of the q-tip.
The end result is a slightly beleaguered-looking P6 (which is how it looked when I got it) that has never once had a failure of any kind, can shoot 1" groups at 25' if I'm patient, and will digest anything from the occasional superlight <100gr loads all the way up to what I use for SD, Federal 147gr HP.
Of all the handguns I've ever owned, this is the one that truly feels "mine."