guys, i have a few rust spots on the exterior of the car. they are about 05" in diameters. the previous owner try to cover it with paint but it's wearing out. looking horrible now. how much would u think this is going to set me back if i want to get this fixed? there's 2 on the edges of the door panels, and 1 on the edge of the gas cap on the rear quarter. what do u guys think?