Use WrapCut towards the surface area with the filament (tape edge) positioned on the desired trim line. Go away about 4 inches of tape exposed beyond the edge of your film so which the slicing filament could be located. Push each the film and tape down firmly for the surface. https://www.apptape.co.uk/blog/5-key-benefits-of-using-wrapcut-filament-cutting-tape-in-your-vehicle-wrapping-projects/