Tried changing my license plate today (new vanity plate) and the idiot dealer had originally used screws that were not rust proof. While removing 2 of the 4 screws two of them broke off in the trunk lid. Is there any way to remove the portion of the trunk the screws are threaded into? I tried unscrewing the mounting holes using a pair of vise grips but they only move slightly and they bend pretty easily. Thoughts?