Went back through some old emails and found this from John Z in regards to the posi label. We were also talking about window sticker adhesive.
"The window sticker used a simple water-soluble adhesive, applied to the printed side by drawing it across a roller mounted across a tray with the adhesive in it. The Posi label used a different water-based adhesive, applied with a brush."
I can not find it right now, but I took a photo of a posi sticker from an original deck lid I have. It showed brush marks. If I can find the photo or the label itself, I will post a pic. It is probably stuck in the back of one of the dozens of car related books I have.