It would be ideal to use a Car Polishing Mop in an enclosed area so as to prevent dust or insects from sticking to the new paint compromising the final result. To obtain a result to be proud of, it is essential to pass a corrosion-resistant primer on the affected surface. This substance will protect the bodywork from rust and allow the paint to adhere perfectly. Once the primer has dried, you will have to again pass the sander with fine paper abrasive paper and then clean the affected part.
Now is the time to move on to real auto painting. To do this you can choose between two options. Paint the car with a can, or use a gun. If you take the first choice, remember to keep the can at a distance of 30 centimetres to avoid the unsightly drip effect; if instead you use a gun to paint the car.