How we did a Restoration pine wood floor - first we nailed the boards, where necessary we put slivers in gaps, we started sanding with sandpaper 36-grain size then 60 we filled the holes with sawdust and resin, then we sanded with 80 sand grain, then we sanded the edges then we went with a buffing machine, stain with Morrell's wenge color, and finally, we put on three coats of pure, clear lacquer.
The job took 6 hours.