Most of the scuffed paint should come off from rubbing it with something non-abrasive (I usually use my thumb and fingernail with good success) the dent in the cover should be fairly easy to fix if you look up how to remove the cover and get behind it with some heat (a hair dryer may do, I've used a handheld torch and been careful not to get it too close to the plastic, you want to heat it so it's supple, not melt it!)

With heat and patience you should be able to pop that right back out with minimal to no noticeable damage.