Welp, this happened to me tonight. I was exiting an airplane at LGA when something caught my wrist and scratched my Space Grey aluminum 42mm on the crown. Really bad. I'm even wearing a jacket over my watch and it still scraped it. So even over my jacket, whatever it was had to be mega hard. The finish is gone and I see white/silver marks. Be careful out there kids. Now I wonder how I could fix this. I kinda just want to cry and throw it in the trash.