cam bucket scuffing

smoky

smoky

Doing my first valve adjustment,650 miles. Every thing looked good intakes were good all exausts were out, to much clearance. My question is after removeing the buckets I found some scuffing on the sides. wondering if this is normal. They all came out easy but do seem to have a close fit in the head. Has anyone noticed this.
9nine0

9nine0

Post missing.