I got a magazine with car cleaning tips in it

(Gotta love CAR cleaning tips

) and for waterspots on your windows (do NOT use if you have tint) For removing hard water stains from windows, try white vinegar water and a green kitchen scrubbing pad. Dry with newspapers.
This may help some too.
Egg on the paint? A heavy terry washcloth soaked in a 50/50 mixture of white vinegar and warm water should be left on the affected area about 10 minutes, the scrape the egg off with your fingernail or an old credit card.