Medium-grit papers are 80 through 120, used to smooth surfaces and remove small imperfections. Fine-grit papers, 150 to 180, are used for final sanding before finishing wood. Very fine, extra fine and superfine papers are used between coats of finish to smooth and remove dust spots and other light debris.
Accordingly, does sanding wood make it smooth?
What Is Sanding? Though sanding makes wood feel smoother, it’s really the process of abrading wood fibers so that they are rendered uniformly rough.
Also question is, what grit should I use to sand wood? Primary sanding of rough wood and the removal of planning marks on wood is often best done with medium-grit sandpaper. Fine sandpapers range from 120- to 220-grit. For most home workshops, this sandpaper will suffice for final sanding before the work is finished.