Temporary repair to rear spoiler

When my wife was removing groceries from the rear, after closing the hatch, the latch did not lock in place. As she pulled into the garage, the hatch swung up against the bottom of the garage door, scraping the spoiler on top. I did a temporary repair with a permanent black marker over the white scratches. because the scratches are on top of the spoiler, unless you are close, they are hard to see. It is now over 3 weeks since the incident, with rain etc, and so far the ink has not faded. It certainly is not perfect but it is still hard to see and I'm not sure that I want to do more. Perhaps some others have a better idea.