I can't tell from the pics whether it's metallic paint or not, but if it is then you'd be doing well to blend it in without it noticing. First i'd see how much of it you can get off with some cutting compound. If you have no joy, the best thing is to spray both the door and the rear wing, the rear wing area extends in one piece up above and along the top of both doors and down next to the windscreen. When I was at work with my dad before he closed the business last year, you'd probably have been looking at about £200-250 ish. It looks worse than it probably is, and is fairly easily rectified.