gummi pflege works really well on the roof trim. The applicator it comes in is very easy to use / apply. I like it better than 303 on the exterior. Black Wow really works the best aesthetically on the exterior, but it does require a little bit steadier hand and for me that requires slowing down a bit - which sometimes I just want to be DONE. So Aesthetics - Black Wow Lasting - Black Wow Ease of Application - Gummi Pflege 303 is a good all a rounder. It is quick, you can be "careless" with it and it holds up "ok" GP is only good on small areas because of its applicator design.
Richard sells a Meguiar's aerosol trim detailer that I use for the honeycombs. Great results and eassssy!