|Elbow grease polish: Free!|
Before I applied the mother's polish to this old caliper from the FLC project, I decided to rub off some of the surface grime. The more I rubbed, though, the better it looked. I think it must be a natural characteristic of aluminum to polish up on its own if you rub it, maybe due to the thin layer of aluminum oxide being a good polish? A little lube on the pivots and this thing seems good as new, almost.