Might it not be better to file the wheel axle rather than the dropouts? I did this once using nothing more than a hand file. Worked fine. Although obv only worth doing if the wheelset is dedicated to this frame...
My bad, I misread the issue as a brake bolt hole thing. I would not touch the fork ends. I saw someone take a Dremel to some frame dropouts once and they made a right mess.
Might it not be better to file the wheel axle rather than the dropouts? I did this once using nothing more than a hand file. Worked fine. Although obv only worth doing if the wheelset is dedicated to this frame...