Well, yeah, that was my point. Colours will wear off, if not after a few weeks, then after a few months. But it will happen, unless you keep it in a sheath or something. There is no such colour to wear off on an aluminum model.
Like I said, my eight year-old MBP looks nearly new... at least in certain light. Yes, there are some scratches and they can be visible in some lighting, but in general you don't notice them unless you're looking for them or looking at it closely. In contrast, the edge scratches on the grey MacBook Pros are instantly obvious to me in a lot of different lighting, and they sometimes look quite bad in an Apple Store just after several weeks, whereas the silver ones in the same store look quite new.
I may also be biased by the black iPhone 5. That was absolutely horrid. But I believe the anodization has gotten much better.
BTW, there is an article at another site confirming the fears about the finish of the jet black iPhone 7.
https://9to5mac.com/2017/09/06/jet-black-iphone-micro-abrasions-one-year/
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[doublepost=1504923829][/doublepost]I just pulled out my 2009 MBP silver and checked it out more closely. There are a few things that would identify it as old, but that doesn't include visible scratches:
1) It's big. But if you didn't know the sizes of current Macs, you wouldn't know that.
2) It has an optical drive.
3) The print on the bottom case is wearing off. But a seller could actually use this to his advantage by just rubbing the rest off so it there was no print on it at all (aside from the serial number that's etched into the metal).
4) It has a modified screw that doesn't actually belong. See here:
https://forums.macrumors.com/thread...h-pix-btw-where-to-buy-single-screws.2065442/
BTW, that thread has some pictures of the edges of this machine. No noticeable nicks at all.