My car has been living outside for a couple of months, not happy about it but them's the breaks.
After finding a good deal of water in the trunk, I assumed it was getting in through the 60 year old rear window seal as the trunk seal and gutter look quite effective. Had not ruled out the trunk seal but it has been replaced. After drying out the trunk & sealing the window with painter's tape, there was still more water in the trunk. The tail light gaskets are very good so this has been ruled out as well. Am I missing something or does this all point to the trunk seal? She is making it difficult to keep loving her!
Oh, the super awesome part... I have removed the painters tape. And with it came significant amounts of paint. Sigh.