Metric, My Star DK is an aluminum framed pistol and is still showing an unblemished finish after five years. The Hi Power is often my “truck gun” and as a result does not get the best of care but still looks as new, I really believe in the Metalife finish.
I put a couple boxes of Geco through mine, over the weekend -- eats it like candy. Also tried out a couple new-production Beretta 81 mags (ordered from berettausa.com), which work perfectly.