Matt's suggestion for a glue should be a consideration or something along that order. Another option that I have used is the old Future Floor polish. Also removing and foil from the small contact area where the window meets the body would also give whatever type of adhesive you use a better contact with the body. Les mentioned painting the edge of the glass black, and since the 1:1 car has a pronounced black rubber seal with a small chrome trim part in it that would be one way to do that.