Just wanted to get everyone's opinion on rotor scoring. Mine have looked like this since about 10,000 miles. Currently at 22,000 miles no track time. The left rotor looks more scored than the right one and one of the reasons I am asking is the left wheel has noticeably more brake dust than the right one as in it actually has spots of brake dust that looks like splattered paint versus the right wheel that just has a uniform coating of brake dust. I haven't pulled anything off, but I suspect this is due to dust/gravel embedded in the pad, but wondering if this is just the standard BMW brake pad and rotor wear.
Left:
Right:
Thanks.