I see you may have already decided, but just to add, I have painted ton's of windows in my life. I don't spray because I like the quality of the brush but I just brush it on the window and scrape later. This gives you the best looking, sharpest edge and the bead of paint helps to seal the window just a bit more.
I can paint and scrape faster than cutting in super careful or taping, of which both will not produce as good as a job.
I can paint and scrape faster than cutting in super careful or taping, of which both will not produce as good as a job.