Any cosmetic damage invalidates the return option. Of course, you may try, but it's not just unethical to do but they will almost certainly refuse to refund you.
So in other words, you want a Mac free of cosmetic damage, which was caused by yourself?
You had it until the alarm clock incident, so why should Apple replace that?
That's like returning a good meal, from which you already took a bite, but still want another one. You can certainly get that other meal, but that would involve lying.