You just put masking tape on the windshield over the area to be cut (about 6" wide), draw the line you want to cut, then just cut it with an electric scroll saw with a fine blade. Then, use a file, then some rough (150 grit) sandpaper on a sanding block, then some medium to fine sandpaper (200 grit or so), then buff it out with a buffing wheel and rouge. It takes a fairly short time, and you really can't tell it wasn't that way to start with. I'll try to get some other photos of the scooter and windscreen.
kuboat
Las Cruces, NM