I agree on the red pad being a good choice. On a recent Acura NSX with soft black paint I had no problems. I can't imagine you would have a problem with the Rover's hard paint.
The plastic pillars on the back of RR can be tricky. I have tried many products, only to be disappointed by the results. Best success I have had is Klasse AIO. Another poster asked the same basic question and someone recommended following the Klasse with Colonite. Haven't tried the combo, but I have been pretty happy with the Klasse alone. Being new, it shouldn't be a problem. Tell him to keep those parts sealed, as once they start to fade they become much more difficult to get the desired result.