I tend to prefer using an angle-grinder, but they don't allow them at the sanatorium...
I had to replace the edging when I replaced the binding on the T'bird and used a block along the edge to keep everything at a pleasing angle with something between 300 and 600 grit, with a needle-file for the edges...
Tom... that's weird... wait 'til winter then out with the file - blitz those frets...
Robert... I wouldn't want to angle an edge to greatly - just enough to not be a problem for the edges of your fingers...