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.
I bought a new BMW last week and somebody side-swiped me. The car still runs perfectly, but do you think the dealership will exchange it for a new one 🙄
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.