I use a lambs wool to do large area's over, say 100 sq.ft. Cut in the edges
with a brush.
But some oldtimers still brush the entire house.
A maroon pad is about 320 grit. 3M makes them. Or you could put 150 grit sticky
sand paper on a white pad, then use a buffer.
Auto supply stores have them on a roll, about 2" wide.
Hand sand the edges the buffer cannot get.
Just vacuum and tack, this is the important step.
When you sand the flooring, sand down through the grits, say 40-60 then 100
DIY's stop at 40 or 60 grit, this is where I make my money, after the wife
threatens them to fix the floor