I think someone posted this[1] here yesterday, but from the description: >Electrical current is run through aluminum in an acid bath, causing oxygen molecules

I think someone posted this[1] here yesterday, but from the description: >Electrical current is run through aluminum in an acid bath, causing oxygen molecules to bond to aluminum producing a thin, uniform layer of aluminum oxide (basically: aluminum rust). Because this surface layer is porous, dye can be used to add nearly any color to the aluminum part before the surface is sealed. While they may talk about Jony Ive taking part in the design in order to convey additional prestige to the product, it could be more involved than just painting a regular Mac Pro. Isn't this how they color the iPod nano? Anyway, it is conceivable that they did at least oversee the addition of color, and that there was a small potential for needing someone with special expertise. [1] http://atomicdelights.com/blog/how-apple-makes-the-mac-pro http://atomicdelights.com/blog/how-apple-makes-the-mac-pro