I have used full extension slides before, but never these white epoxy coated ones. What I'm finding is that where the middle and outer parts bear against each other it's cutting through the epoxy down to bare metal. I can feel the grit as they operate.
I thought maybe I had installed them out of whack, but I noticed it on the first pair I had just taken out of the packaging and fooled around with a bit then set aside.
I don't know if once they wear all the epoxy off the mating surface they'll be okay or not. There doesn't appear to be any way for the grit to get out of there, and I can't see any way to take the middle part out.
These are 100 lb full extension slides from Lee Valley (02K37.12), who I haven't contacted yet. Just figured I'd see if this was typical for this type of slide before I get Rob's minions fired up.
-Leuf