Is there any product that can be used to fix minor scratches on car body?

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I have Swift car in metallic grey color. In society parking many times some mischievous elements scratch the body with some sharp object or keys and damaged the paint at many places.

Now, there is no real damage to the body but the paint has come off due to scratches by sharp objects. Is there any product that can be used to do some repair job or mend the scratches so that the car paint becomes a little better than before. It is of no use to take it for repainting at service centre and hence want to repair it myself.

Can anyone suggest some good product to fix paint scratches on car body?