OK, we got our two rough cut pieces of paper ready to go, so we lightly mist the fully rolled up window and 1/4 glass with water (no soap in this water!). Line up the pieces of paper and smooth them out nice and flat. If the window causes the paper to finger, then it's going to cause the film to finger too, so move those fingers of paper to the bottom edge. This is important because the film is going to be shrunk at the bottom, if the paper does not reflect the proper location of the excess material, the final piece of shrunken film may not fit as exactly as it should.