Similar thing happened to me. Had my new Leon about 2 and a half weeks before someone decided to remove some paint from it with their own car. Had two quotes so far to get it repaired, £316 and £565. Haven't decided yet whether to go through insurance or just pay it myself.
People are monsters.
Check how much your insurance will go up by.
Remember to reduce your NCD (if not protected) and add a fault claim.
Then consider your excess and decide if it is worth claiming on insurance.
For a brand new car surely it's worth paying £316 if the scrape is noticeable.