I've used pledge. Plain ole turtle wax also works So that's not an issue. but for years I've read the evils of rainx and how it will make the bike crash and burn and i'm stuck in the house. Got to wondering about things and the rainx question is one of those things. Ive googled "how fast will rainx destroy plastic" and everything comes back it will but not when so is it days, months, years or does it have the half life of nuclear material
I use Lucas Slick Mist on the whole bike including the Shield. Two and a half years hasn't hurt it yet. Its safe for plastic. Rain runs off and the bugs come off easier.
Another fan of Lucas Slick Mist here. It's the best quick spray I have ever used. Running up and down the Alcan and Cassiar highways it keeps my bike looking good and the nasty north country bugs come off easily.