Sanding the Living Room Floor

Once all the carpet was taken up in the living room we rented (yet again) the industrial sander.
Here are the before pics:

The floor isn't in bad shape, but there were a number of paint spills.
Here are the after pics:

 

Now all of the holes need wood filler, the cracks need picked out and it will be ready for the stain and polyurethane (3 coats each).