Scratches and bumps

Good evening, someone knows if you get the scratch out again by polishing, or by smart repair the whole has to be painted. It is about 38 cm long and at the end lightly dented (the last quarter). Either a parkrempler or playing children By the way: Can you remove the central decorative strip at the door (Audi Coupe B4) without making it capputt ? So far I have only found the discussion whether it is clipped or glued. Greeting, dackelbau1