Westheimer Plumbing & Hardware Normal wear and tear: no it won't scratch. If you are rubbing a pot across the bottom with more force it can scratch it. Although it is copper all the way through so you will see the shiny copper from underneath. Over time it will patina back to the dark copper and you won't be able to see it as much.
To help protect the finish and give it a rich natural luster and slow down the natural oxidation process they recommend using any carnauba based paste wax. This may be reapplied when water no longer beads up on the surface of the sink.

Gina Johnson ah i love Stone Forest. They do make stone sinks (and BAMBOO sinks). One of their more daring/adventurous sinks: