Would it be appropriate to sand a floor between coats of poly with a handheld orbital sander?
I had two floors to do once and between coats I used a broom with 3 bits of fine sanding paper taped to the broom head - cheap, cheerful and effective...

Also, had to punch down the floor brads (nails) so they were below the surface...

Those floors came up magic but also vacuumed after sanding to remove the dust...