The manual instructs you to place masking tape along the scribe line.
The first photo reflects the almost imperceivable mark. I am not certain that this is the mark because it seems to be an incidental line of material ( the white stuff that is the outer surface of the fiberglass ) that is remaining from the manufacture process. The second pic is the tape placed on that faint marking. Does this sound or look familiar? I also am not understanding why I am only removing the top surface. Have I just not read far enough to see when I remove the bottom surface?
Eddie