Sanding wood floor usually requires multiple steps to follow, and honestly it’s not quite an easy task to do it properly. The sanding process have to be executed carefully with professional tools, and the most important: by professionals.
A complete refinish, usually requires sanding down to bare wood. This procedure is used for wood floors, which are very worn, full with scratches ( deep scratches), stains, water or other type of damages.
The sanding process is done with a special machine called drum sander, which uses a rotating sanding drum.