No two scratches are created equal. The damage of the scratch will be determined by a number of factors including the paint of the car, the age of the paint, the object that caused the scratch, and the force at which the scratch was delivered. When an object is softer than your car, it will rub against the paint, leaving a deposit of material instead of scratching. Those objects that are more resilient will cause the scratch. Examine the size and depth of your scratch to determine if you can fix it yourself, or if professional help will be needed.