Use WrapCut into the surface area Along with the filament (tape edge) positioned on the desired trim line. Go away about 4 inches of tape uncovered outside of the sting from the film so which the slicing filament can be located. Press both of those the film and tape down https://www.apptape.co.uk/blog/5-key-benefits-of-using-wrapcut-filament-cutting-tape-in-your-vehicle-wrapping-projects/