I saw my friend the other day with his jeep liberty. It has the plastic bumpers. He was spraying the UV armor all stuff on it and complaining how every time it rains, the stuff streaks, and he has to reapply.
I've found that a lot of exterior vinyl/plastic/rubber pieces can be LSPed, especially with the Klasse twins, 845, and Souveran. I hear Zaino works well for this too.
I first started doing this over the same issue, product run-off, and also because the dressings kept soiling the Jag's car cover. I've been LSPing its exterior v/p/r for over 20 years and it's still like new.