I feel that the pix all depict damage to the clear coat, and microscopic, cosmetic at best, damage to the aluminum.
Same thing happens on CF frames with clear coat. Just get the clear coat off with mechanical abrasion (very fine
abrasive only, gently applied) and spray on some new clear coat. Automotive would be fine. Matching the polish
on the underlying aluminum will be difficult but possible, real problem is getting all the striations to line up.