This question has options. How would someone go about accomplishing this goal?
How to polish aluminum for a Back Pack Quick Release Pin

OPT:
(1). You can polish the aluminum on your Quick Release Pin with sandpaper and grease. The smoother it is, the better it will slide..
(2). You can polish the aluminum on your Quick Release Pin with buffing wheel. The smoother it is, the better it will slide..
(2).