How to shrink the back glass of a Ford Focus without removing the spoiler

Method 1: Use the liner to cut your shape and use it as a guide to cut the film 

Method 2: Flip the film upside down to shrink, and then right side up to trim and touch up. 

Method 3: Dry shrink as much as you can, and then hand cut the bottom and sides but leave the top long. Install normally but then trim the excess on the inside and do a wet shrink.