I'm partly joking, since I don't know what you wish to achieve. What is B2B not doing for you?
I've used it and have been very happy with it for restoring oxidised and contaminated trim.
Another two products that I found impressive where Megs Heavy Duty Vinyl Cleaner (#39)
and 1Z Plastic-Vinyl Cleaner "Plastik-Reiniger"
Both are sprayed on and scrubbed with a detailing brush, then rinsed with a damp MF.
I've had amazing results in removing years of grime and wax residue with these two products. Unlike Mothers B2B, they offer no protection so you'll need to dress the trim with something, that's one reason I like B2B.
I'd have to say that the 1Z P R is a great cleaner, but if you're looking for something to restore and "blacken" EXTERIOR trim then 1Z TIEFENPFLEGER is what you need.