I found a small white line/scratch/mark on the imac. How scratch resistance is the aluminum material and the screen? If I take a cloth or Tshirt will it rub off or scratch the grey aluminum? How tough is it?
Aluminum can easy scratch as aluminum is not the hardest metals, and plastic is plastic so yeah that can scratch as well. I wouldn't be scraping a dime across the screen if I were you but normal precautions would be sufficient to keep it in pristine condition
To my knowledge Apple clear anodizes all of the products they make that are alum. Now as to how thick that anodizing is is behond me (Mil-Spec type 3 Hardcoat being the most thickest, most durable of all anodizing) I highly doubt its that or (Mil-Spec type 2 anodizing) which I also doubt is that either. Now as with any anodizing the finishes can vary and I'm not so sure with the thickness if it can vary as well but I know if the anodizng is really thin it will be easily scratched. I'm a real anal perfectionist kind of guy so I hunt and look for perfect in pretty much everything I buy and if I come aross the most slightest only I will see flaw then I'm not happy with and the product or whatever it is must go back to who I bought it from but thats just me.