I would tape up as close around the bump strip as possible and cover as much of the side of the car as possible, then rub the strip down with some cause wetand dry then some fine wet and dry. Then check you haven't damaged any of the tape if so repair the tape.
I would be tempted to use a plastic primer as it tends to be a little more flexible, make sure its dry with no runs and you are happy, then a couple of coats of the colour and when your happy with that a couple of coats of lacquer. Careful lacquer takes ages to dry