Drew, ask Dave what the advantage of the naptha is? My door gaskets are giving me a hard time staying in place and I used the 3M stuff directly.
Rob--David learned this technique at the Werke Shop. The Naptha/3M mixture can be painted on both sides with a brush. He said it then has more adhesion properties. He first cleaned the mold release off the rubber seals with 3M solvent remover,which he likes better than lacquer thinner. He also cleaned the door metal.
He used this method when he correctly installed my door seals several months ago,and that's why I wanted him to glue on the door edge rubber.
Again, his knowledge of how to properly install parts on our cars is invaluable.
Note ,I used a razor blade to scrape away all of the yellow 3M glue on the window. None of it was stuck to the inside of the alum. trim. So much for a good solid adhesion of the 100% glue.