Screw having someone apply a "paint sealant" to your car, its not worth the money they're going to charge you. This is something that you can do yourself and don't worry about the paint, I'm sure its good to go by now
Quite simply, apply some Klasse AIO, then follow it up by (2) coats of Klasse Sealant Glaze (waiting 8 hrs inbetween coats) and finish it up with some quality caranuba. Your choices are many, but don't worry about white residue if you go with one of these:
-Pinnacle "signature series"
-Pinnacle "Souveran" (made for black, red and dark colors)
-S100
Once your done doing this, rinse the car and dry it off to even things out and your all set. Make sure you use microfiber towels to remove, it is also your friend. After this, I'd do the car once a month as black is very demanding
