All the panels you have mentioned were painted semi-gloss black at the factory. In the front the luggage compartment was painted body colour but the spare tire area was s-g black.
A decent option (as in, it will last longer than the semi-gloss lacquer the factory used) is truck bed liner. Bonus is that it is tougher, adheres better (the semi-gloss was just shot onto bare fiberglass...which after decades just flakes off, the urethane adheres a lot better), and is easy to clean. Lots of folks are using it these days, especially in wheel wells, underbody, inside the boot and bonnet lids, and engine compartment. If you don't want the grit they usually put in it, strain it through an auto paint strainer (they're $.15 each at the local auto paint store) and be done with it. I've used it on all my renovations...and my body guy (retired, sadly, since this TCS would really benefit from his attention...) suggested it on all the restorations he did, and everyone was satisfied (and I have the trophies to prove it..lol)
(I'd like to know when the factory stopped putting in the reinforcing beams on the two lids...my S2 had them, the TC doesn't. Couldn't have been to save that much weight...probably a cost-cutting maneuver (they also deleted the bumper stops on the bonnet).