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Old December 1, 2021, 11:10 AM   #4
Senior Member
Join Date: June 19, 2010
Posts: 2,118
The Bruniton (paint) finish is inevitably going to get worn down to varying extents where the slide makes contact with the frame rails and locking block and where it runs across the slide stop and the rear of the trigger bar. The wear spot at the top left looks a little odd to me, but everything else looks normal and should be self-limiting. Use some grease on the contact points if you want to slow down the wear. Grease is always a good idea for protecting the anodizing on aluminum-frame guns wherever the frame contacts the slide (and, on a 92, where the locking block contacts the frame) anyway.
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