I am a fan of a dehorned gun so long as it is not "melted". I bought a 3" SP-101 about 3 months ago to replace the 2" my wife claimed as her own. I was looking at some of the bueatiful work done by Gemini Customs on the SP's and decided to do a little of my own. I have been dehorning 1911's for a number of years but this was my first revolver.
One area of concern to me is the trigger guard. They always have flat sharp edges that are uncomfortable under recoil and long shooting sessions so I went to work on mine with small round files and 120grit wet/dry sandpaper. It smoothed out really nice.
I then decided to do the same on the lower and upper frame edges.
I decided to radius the chamfered face edges of the cylinder, then followed with the bullet shaped cut-outs.
Of course I could not forget the edges of the barrel.
And since I was not removing the hammer spur on this gun, it needed to be worked on as well. I have 4 Ruger revolvers and they all have hammer spurs that are sharp, with tight corners and thumb mangling checkering on top. I rounded the spur and raduised all edges. I then chamfered the edges of the top where the checkering is and broke the tops of the checkering as well. I really like the way it turned out.