The safest thing to try on a painted or anodized black cover is a Sanford Sharpie.
A Sharpie is basically a laundry marker with durable ink. I've had amazing success, particularly with the "Ultra Fine Point" version.
The good news, if it looks worse after you make the repair I can be removed with a little effort.
The Sharpie cannot fill a deep scratch, one that is down to the metal but the only way to make that kind of damage like new is to refinish completely. I'll be surprised if the Sharpie doesnt make it all but invisible and its almost no cost, no risk.
A Sharpie is basically a laundry marker with durable ink. I've had amazing success, particularly with the "Ultra Fine Point" version.
The good news, if it looks worse after you make the repair I can be removed with a little effort.
The Sharpie cannot fill a deep scratch, one that is down to the metal but the only way to make that kind of damage like new is to refinish completely. I'll be surprised if the Sharpie doesnt make it all but invisible and its almost no cost, no risk.