Dattodude I myself have used WD40 for this job myself and it truely is perfect for the job, Its only that Lobster is in the middle of body preperation that I said its no good for the job. The silicon in it will cause major pain, and WD40 soaks in well, straight through the primer into the metal.

And the stainless corner trim It might be best to take out, Its just I never did on my old 1200, I did break the outside seal between the body and the rubber like you said with a screw driver, But then I just go inside and bend the rubber lip to push the window out, all the time the rubber is still attached to the window.
Maybe we just have different tecnique of removing windows.