so a while ago i basically focused my mk1 on accident, dropped it on some harsh pavement looked like it took a mini shotgun blast, i used some super fine grain sandpaper to get all the scratches out but that process took off the polished coating on the lens. ive read a couple things about how toothpaste, which is actually slowly working, and other remedies can be used and was wondering if any of you guys have had this problem and found a good solution