Sanding is very good at removing defects at wood surfaces .
Sanding creates a surface that contains minute scratches in the form of microscopic valleys and ridges , and also slivers of wood cell wall material that are attached to the underlying wood .
Sanding is very good at removing defects at wood surfaces , but it creates a surface that contains minute scratches in the form of microscopic valleys and ridges , and also slivers of wood cell wall material that are attached to the underlying wood .