All right, just got back from the Apple Store from my appoint to get my phone replaced. Things went pretty well. The Apple employee was very friendly this time around.
I called Apple yesterday and told them my issue, I had them book me an appointment specifically telling the store my case and that Apple was prepared to replace my phone. Today when I walked into the store (Fairview Mall Apple Store in Toronto) I explained to them my issue. I said that I had bought the phone, had a large chemical mark on it and replaced it once, then I noticed the dents and smaller chemical marks on the replacement. I then told them about my call with AppleCare and how they told me I could get my phone replaced etc.
At this point, I showed the marks on the back of my phone and the dent on the corner. The employee at first told me that they could only replace the phone once for cosmetic issues and went to talk with other workers.
A few minutes later he comes back and tells me that he can open ONE more only and if it still had issues, I would have to deal with AppleCare over the phone. He also says that it is normal for aluminum products to have dents or whatnot on them. At this point I asked "even if its brand new out of box." to which he replies "yes." Well I agreed to proceed with the replacement and decided to test my luck, if the phone still had issues, I'll just see what I can make of the situation.
He comes back a few minutes later with a phone from a white box, a service replacement. At this point I really didnt care if the phone was refurbished or not as long as it was in acceptable quality. Once the phone is opened up, I inspected it carefully for defects. The aluminum on the back this time looked good, no chemical marks, no black dots and no scratches. I look around the edges and on the top corners I find no dents. Then finally on the bottom back corner of the phone, I find 1 small black chip in the aluminum. This time it was not a dent but more of a chip of the paint. The mark is incredibly small and I could barely see it but it was there. I then proceed to check the other parts of the phone, screen, buttons, edges edges and edges. I find no other marks so I decided this is acceptable. The black dot is very small and I can hardly feel it. This was different from the dent in which I could see (and be annoyed by) easily.
All in all, I'm statisfied right now. I have a phone that is 99.99% perfect and IMHO, I'd rather have a beautiful design with a slight mark than a plain device thats 100% perfect.
I would say that at first, the store did not want to replace my phone, however I brought up Apple's own marketing about the design (29 mp cameras, fine precision like a watch, etc), the fact that AppleCare agreed to replace my phone, and this very thread about scratches. After that the store really did not have anything to say. For other people going in store to replace their damaged phones, just make sure you have some points to say about their marketing, other people with similar issues, and if you can, ask AppleCare to book the appointment for you and ask for a service number.
I believe Apple may have told their retail stores to deny the problems and just say that aluminum dents. Even though the employee told me that today and I was quite shocked for him to say its normal for a BRAND new product as well, they were helpful and nice and got me what I needed. I believe it would be hard to another company to replace a phone for me 3 times for something cosmetic even if its their QC problem.
Although this whole thing has taught me to just wait next time to get a new device, I'm definitely not going to be an early adopter of a electronic device anymore, especially if its a device that has been heavily refreshed!