You can go to an Autozone or Advanced and they usually sell our paint colors (they did for mine) in the form of a paint pen. You wont get it looking back to the way it was but it will protect the car from oxidation and cover up the defect, you wont notice it from a distance.
This. They just ran a deal last weekend, sign up for a coupon code. Works great, and super easy. Pricey but the kit/method works well and can be a near flawless application.