Sorry to hear about it,... sadley I believe most damage done to cars of these caliber are mostly by unaware nitwits that could carless about there car aswell


..the scrape looks like it shredded the surface where it touched, not sure there is anything that can be done besided having it sanded down and repaired

if the dark marks are not the actual part (plastic) you could get ride of the other paint, use wax to remove any paint/color that was not originally there