I’ve seen some people only do up to the spoiler, even the factory T/a is like that. Still haven’t decidedYa they make wrap spray you can put on its sort of like a McGuire interior cleaner type wax. Just search for chemical guys version. 3m is a great vinyl. Easy to wrap and great air release. Will last years.
Personally if I had a black car like yours I would do the satin still. I love that style and I think it’s really clean. It’s subtle and a sleek. Good luck on the trunk. Take off your spoiler and wrap the vinyl to the top of the rear lights and tuck under the plastic piece there.