Nice car. I've had quite a few nice cars in my time including Black and Navy blue metallic Vettes.
I also owned a body shop way back when. A Vette I painted won first place at the Nassau Coliseum about 40 years ago. Man, I'm old.
I've tried a multitude of products and I think for the money Zaino is best.
https://www.zainostore.com/
You use just a tiny little bit with a multi step process. It leaves no residue in the cracks and on the rubber etc.
When I took the cars out after waxing the compliments were plentiful.
One of the most important things on a dark car is to not use any cloths/rags not made in the U.S.A. Must be 100% cotton
Extremely hard to find made in U.S.A, towels and wipes made overseas have abrasive fibers and processing that leave scratches.
I have some very old towels that were made here.
Just my 2 cents.