Steele Rubber Products has a brief, quick 6 pic tutorial about some weatherstripping gluing tips for those replacing rubber bits on their car. I agree with 95% of their assessment, especially about not globbing it on, but I can tell you from experience that G-bodies' factory-installed weatherstripping usually did not have their weatherstripping glue spread out with a popsicle stick. A very thin bead of adhesive is what the majority got and trust me, that was usually enough. That stuff is a motherbear to get out of weatherstrip channeling and the less the better. Will never say never, but I got a feeling things weren't all that automated on the gluing portion of the weatherstripping from what I've experienced and very few places they put "extra" glue. The goal is a water-tight seal and prevention of the weatherstrip from falling out or off it's channel, and you don't need much. Another tip is to use black adhesive to match the weatherstripping color in case a bit gets pushed out of the channel. Won't look as bad.