There are some cool fire bomber schemes that would look really nice on a model. I've seen them in either silver or white with day-glo or bright red markings.
For more paint scheme ideas go to airliners.net and hit the the "Take me to the photo search page" bar. Then, on the photo search page, type GUARDIAN into the keyword spot, leave all other blanks as they are, hit search, and you will get pages and pages of photos to look at. This works for any type of aircraft, it's awsome.