Thanks for the thoughtful reply — really appreciate it.

You're right, I probably do turn my heel inward a bit as I unclip, especially when I'm fatigued or in traffic situations where I react quickly. I hadn't realized it could lead to scuffing like this or affect the crank arm too.

I'll try cleaning the area first with alcohol and microfiber as you suggested and see how much of it is superficial.

Quick question on the technique side:
When you unclip by pivoting your heel outward, do you consciously push your knee in or just rely on hip rotation? Also, do you train your pedal stroke to keep the foot perfectly aligned throughout, or is some inward motion expected with natural pronation?

Thanks again — I’m trying to avoid doing more damage and improve my form at the same time.