Not my cup of tea, but at the end of the day it's whatever you like and you think you are going to enjoy the look of. People might also think you are a hairdresser, which you might well be, I don't know.
No, please, not pink Z4s again. You know how I get when you all do this
As for your brake calipers Emma, I reckon a you could get away with a metal list silvery pastel pink. But if you're going to tidy them up you'll need to do the hubs too - what colour for them ? :?
Heaven forbid. Polka dot, gingham? oke: I reckon blue. if you sell the car your restricting the buyers by 50% unless you repaint them. Yeah it's a crap excuse, its the best i could think of, it's just I sigh when I see girls with pink cars or pink details, it's soooooooo last century but not long enough to be retro.
Pink it is then because I have yellow, so we are opposites, go for it, I know nothing. orange would look good mind, nice and bright and defiantly different??