Wow. I guess I shouldn't be surprised. After reading over at GTPlanet, it sounds like they botched the entire DLC thing. DLC is tied to your account and is region locked so make sure you buy it from your main account. You won't be able to use it on other accounts. Paints can't be gifted and are single use. You have to buy multiple paint packs to get your cars all the same colour. I'm stuck with PD and Sony this gen but I may be switching for the next gen of consoles.
Interesting, I'd hoped if I brought it once I'd be able to at least use it with the 2nd account on the same actual console like the Pre-order cars / Edge Camaro but I will defintely NOT be buying it more than once (if that, at this point).
The paint issue just highlights their ineptitude at this point, not being able to trade the DLC paint I can understand but only giving you 1 of each per purchase is somewhat mind-boggling, I get they don't want people cloning them and they want to make more money by making you buy the paint pack again but they could have at least given us say 5 of each colour (or let us choose our own selection of 100 chips from the DLC list, so we can get multiples of one instead of 10 unwanted chips). I would assume too that if you use a special paint on a car and gift it that the receiver won't get a copy of the chip either.
So far Spec 2.0 seems like generally a good thing but the following DLC appears to be coming with a large side order of Ineptitude. And coming out on the 25th now is actually making me consider not bothering with it and just getting BF3, with even just a week's difference in release dates I was going to get both without question but now I find myself hesitating to get the DLC.