Alfisti- Heh heh, I'll readily admit I don't know what's going on with my wax-on-rubber

It's not just on the Jag either, when I had the 240 Volvo I did the same thing on its rubber, even using 476S (!) and it worked OK on that car too.
More recently, I've been using the Klasse twins on exterior rubber with great results.
I kinda suspect that the PDs aren't all that strong, and the rubber isn't all that sensitive, and that the whole issue is kinda overblown. You know how people can be...displaying "expertise" (scare-quotes intentional

) with oh-so-dire caveats of impending doom makes some folks feel imporant.