Well the hard part for me wouldn't be the sanding.. The tricky bit is to get them centered. And using the plek machine, with a fretted guitar, lets me use the frets as measuring points.
I'll mask the frets of with two wooden scraps and file down the inlays across the board, and get some of the super glue residues (from seating the frets) at the same time.
Well that's the plan, anyway.