Hey Paul,
I have a black car and this is my favorite product line up.
Clay the car if necessary, use megs quick clay as this is super easy to use and quite mild.
Then i use the following products.
Autoglym Super Resin Polish
Autoglym Ultra deep shine (you can use either of these, you dont need both, the SRP has more cut and no very little fillers)
Clearkote red moose glaze
Then i use Poorboys EX-P cos my car is a pearl with alot of flake, as yours is just solid black id use Poorboys EX or Autoglym extra gloss protection.
Then my favorite for black is Poorboys nattys blue, but Pinnacle souveran is also awesome on black.
This little lot should leave that black 3 door with a shine so deep you could swim in it
Hope that helps
Frayz
Not a cossie but you get the idea