I'm just going to leave them, the camera flash highlights the difference more than there actually is. I intend to actually pull the old material off from the door panels when I do those, rather than glue over like the deck, since I'm SEM dying the panels themselves.
I'm not sure what you mean about the belts? I just threw in a set from a 93 and they worked without issue. The driver side front belt did have slow/incomplete retraction issues with, which is related to spring fatigue which I cranked some extra tension into, I imagine that would work on the rears as well but never had to do it. The spring is on one the side of mechanism inside anything from a black, blue or white/clear encasement, held to the assembly by 3 molded in tabs, so you just carefully and evenly, whilst keeping your other hand firmly pressed over it, pry up the case using a knife blade and flame blade screw drivers and once all tabs are released rotate it in the direction of tension a full turn, and then push it back down(I wouldn't do more than 2 full turns or it will bind at full extension). Additionally you could rotate the opposite direction, releasing tension - noting the number of turns - and remove the spring and disassemble the whole belt assembly from there, and throw the belt in the laundry. I've not tried that yet myself (the cleaning, not the disassembly) but the theory is all the oils and grime that accumulates on them actually slows down retraction as well.