I just purchased black edition H&R DRa spacers BMB50757252 (e-bay from Tunershop-worldwide) as I had one of my silver ones damagedsomehow ;(.
I'm much happier with the black set. But yes you could always spray paint silver ones.

I ONLY run these on my winter set up. I have the 168's with NO wheel arches/flares and MUCH prefer that fitment since the 168's sit perfect with non-flared X5's and if you add that arch you then have to go wider again with hub spacers to achieve the same effect as not having the flares installed. all personal preference.

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S