Thanks for the answer.
Yes, I’m familiar with the anodisation process, but the black surface will get scuffed eventually.
I tried putting a shrink tube on the clip, but even though it’s thin, it no longer fits due to the tightness you mentioned.
If the clip were permanently attached and the station stayed on my desk, I wouldn’t be worried. But since I plan to use the station as a portable solution, I think the anodised surface will get damaged sooner rather than later. The clip has already left silver marks after just a few uses.