You can get aerosols of exact match paint on eBay that come with primer and lacquer, I have done one of my sills with one with OK (ish) results, would be a lot more noticeable and harder to blend in where your damage is as it's a more prominent position, also these aerosols are cellulose paint which hasn't been used by manufacturers of repair shops for donkeys years.
The Halfords bumper protectors is a solid suggestion that would save a load of aggro, it you decide to self repair there are plenty of videos on youtube, watch a few before you decide.