So... I have tried several searches. Was not able to locate the post with damage pics. Grateful for the pic above. What I'm seeing is on the aluminum frame, not on the slide. Sounds like Duty Treat is not used on aluminum frames.
I've gone through my cleaning supplies & tossed out several lubes. Also threw away my old wipe down cloths. I'm sure there must be remnants of CLP on those.
I liked the MD Labs XF7 lube. The applicator needs improving though. It's a big syringe, but the grease pushes up past the piston & then you have to scrape it off. I tossed the remainder in the trash.
Still a bit concerned about Mitch Rosen Leather Lightning. The ingredients are not listed. I attempted to call DW, but I suspect they are closed due to Covid-19.