It isn’t “made” of white gold or “plated” with white gold. It is an urban myth intended to play on our anti-Arab prejudices. It is nothing more than a special finish.
It turns out there are more chrome SLRs out there (UK soccer players):
http://cache.gawkerassets.com/assets/images/12/2009/05/William_Gallas_Chrome_SLR.jpg
More here:
Google ‘chrome SLR’ if you’re curious.
http://alsacorp.com/products/chromefx/
I sell automotive paint and have seen things like this before. The website I posted above is an example of faux chrome. It’s still more expensive than a “regular” paint job, but it creates the same effect as the photo presented. Who said it was gold? A source without traditional journalistic accreditation or factual evidence? Interesting…