I have some Nicholson files - thanks to my late Father.

I also have some diamond files - but they are tiny for some very detailed work... File may work - I've tried it, but, boy - it's slow going and it's not removing much of the material - it's pretty flat so it's hard ot get a good 'bite' into it.

I may get a drum sander attachement for the drill press - which I have... that maybe the way to go.

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1987 Mercedes 300SDL; SOLD
1985 Mercedes 300D; SOLD
2006 Honda Pilot - wife's ride; 122K;
1995 Toyota Land Cruiser - 3X locked; 182K