Attach this disc to a battery powered kitchen egg stirrer and glue sanding paper to it. I tried 180 grit paper but it was too aggressive. 600 grit worked much better.
Bonus feature: Kids like it. You can use it to grind back finger or toe nails instead of cutting them.
I used PLA at 0.1mm layer height with 100% infill
The author hasn't provided the model origin yet.