Why touch it up??? It is easier for the painter to do the entire car than to blend in a number of spots. Get a price quote for the entire car and the spot job. It may well be worth the few extra dollars to do the entire car. Being that you are going to the same color as it is now the painter will only be dealing with the exterior. He will not need to paint the inside of the doors or under the hood and engine bay. Have him pull the silver windshield trim and the silver side strakes and paint them while he is at it.