I took my rear sliding windows out when I got the truck painted. I wasn't ready for what the rear window frames looked like! the aluminum frame is really corroded & disintegrating. Trying to replace them is bloody difficult so now I'm reaching out to the community to see if anyone has done any rebuilding or lasting repairs. My other option could be to replace the sliders with the full cargo window from the LX470 series.
I'm sure this problem has haunted many others as well so I'm hoping for some interesting replies.