Rennlist - Porsche Discussion Forums - Reputable Body Shop in Washington, DC Region

Some thoughts:
There are mobile guys who go from dealer to dealer to respray bumpers on-site for a lot less than a full-on body shop job. If you are looking for a concourse level respray use a good body shop. If your car is a driver that will get pitted all over again you can consider one of the mobile guys. Call a local dealer and ask them who they use or what day of the week he visits their dealership so you can speak to him. You can watch him work and decide if what he does would be satisfactory for you. For $100 or so he will overspray it and you are done! Clearly not as durable as a full-on prep and repaint but for many, it looks good and it cost little.
At the other end of the spectrum if you go to a full-service shop consider a really durable job specifying a 2K urethane paint rather than the standard acrylic most shops use by default. 2K paint withstands flexing a bumper cover may encounter as an acrylic paint won't. Be aware some cars are single stage painted, all top layers carry color, such as my '96 Speed Yellow others are two stage with a color layer(s) and a clear coat over it to provide gloss. Ideally on a pristine low miles car, you will always want to use the same type. For a daily driver where one wants it to look good but it is not a collectible grade car I guess it is up to the owner what paint type is good-to-go.
Andy