I’m using a drum sander and just finished with 36 grit, doing 60 grit next, then 80, so three passes with the drum sander. Would I then do a fourth pass with 100 grit on the Square buff? I’m planning on staining so I don’t want to go higher than 100 grit. I also got 80 grit for the square buff, would it be better to use that or the 100 grit on the red oak before staining?

After staining the red oak I plan to do two coats of bona mega one, go over it with 220 grit with the square buff, then do the final coat of finish.

On the pine floors I was planning to do 36, 60, 80 with the drum sander, then 120 with the square buff. After 120 grit, I’d apply 1 coat of Bona ClassicSeal, two coats of Mega One, go over with 220 on the square buff, and do my last coat of finish.

Should I sand between the first and second coat of finish? If so what grit should be used? Any other tips are appreciated.