Quoted from vid1900:
Here would be the best example in the world.
A Steel magnet core (you know, made of solid steel) is covered in dimples from the hardened steel ball.
Now tell me of ANY wood that is harder than solid steel?
Take your time, I'll wait.....
My magnet looks the same after 7 days of playing at home.
(congrats for the picture it is hard to take).
So it is normal ? I can't complain about this ?