That blower case is billet aluminum which is a softer than a lot of the components in that box. i see a lot of sharp machined edges too. That shot of the edge of the blower case is an extreme close up on a polished case so the scratches look a lot deeper than than a normal ranged photograph. I see a lot of things in that box that could have caused that damage if items were loose inside. If it was sent ground, it spent a lot of time in vehicles, maybe sometime on it's side or even upside down.