If your tool can hold something like this from Amazon or somewhere else they should do the job.
I drew up a quick sketch trying to show how to do it versus trying to explain it in words. Hopefully it makes sense.
View attachment 533878
Just be careful checking the edges with you fingers, I speak from experience on that
https://www.amazon.com/Metal-Grinding-Stone-Rotary-Wheel/dp/B09V282ZH1/?tag=wranglerorg-20
Or: https://www.amazon.com/AFA-Tooling-Deburring-Blade-Blades/dp/B01L2XR4P2/?tag=wranglerorg-20
The manual version. Regardless of which tool(s) you use, be sure to wear good quality safety glasses. Eyeballs are not cheap.