I have pretty bad window scratches on my 32 aswell, but it seems to be a very common problem, even with 4 doors and GTRs. My door seals have curled up from being left out in 40degree heat with the windows show (it's black ) by the previous owner, so I think my window is getting pushed against whatever is causing this scratching even more than most. I'm getting the seals replaced and will see what is causing the scratches and how to fix them so I can get the windows buffed. I've seen so many skylines with this problem, I can't believe no one has come up with a solution yet