On the window I was referring to, it had some curve. I squeeged the hell out of it, but there was a thin layer of water under it, like a drop of water that was creating a suction. I also did spray the paper (tape) with the solution several times and let it set long enough that it looked like it was lifting off all by itself. So to finish the job in a timely manner, I went dry. Mopar691, how do you do such a large piece dry? plenty of patience and experience I suppose!