Newbie here. I have an 84 FJ-60 and a 77 Bronco to play with. on the FJ-60, I have a little rust around the rear side glass (big glass in the cargo area) that goes on under the gasket/rubber trim/whatever you want to call it. I can't tell how far under it goes. I'd rather not pull the entire glass out if possible. Does that gasket/trim come off easily or does it completely surround the glass (and extend into the interior)? I have never owned an FJ-60 and Ford's don't rust so it's all new to me...