Re: My winter project
That anodized aluminum trim is a huge PITA to restore. It get cloudy with exposure, dent and scratches easily. About the only restoration you can do with them is apply new woodgrain tape to them and repaint the black if they are otherwise nice. I have seen guys strip the anodizing off, then polish the aluminum to a high shine. Without the anodizing in place, the trim will dull easily just with the ambient humidity.
Fortunately, there are a lot of NOS trim out there for most of the sections. The hardest ones are the Blazer specific forward quarter panel pieces.
Mar-K makes good repro trim if you can't locate NOS.
As for the retention of these, I would stick with the OEM steel clips, either the threaded or push in variety depending on location. Some locations on the trim used the plastic adhesive clips, mostly in the middle of the longer side trim such as the door and quarter panel pieces.
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1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress... 
1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 
2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2...
2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels
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