Yes, you can, but it can be quite a daunting task to do a professional job. The most straightforward job to do yourself is to buff, or polish scuff marks away. You can buy kits like this Meguiar's G190200 Quik Scratch Eraser Kit from amazon with the easy to follow instructions. When repairing scratches on your automobile, the more challenging jobs are those deep scratches that need fixing. For example, you'll require vehicle-specific paint, sanding paper, a clean, dust-free environment, and many hours for preparation before sanding, cleaning, painting, and then polishing the car.