Here are some video's from a pro concerning all aspects of vehicle wrapping.
The video information will should "wrap" up the discussion of DIY wrapping of a trailer and provide some information as to the process of "Rapping" a vehicle or trailer and information for the soon to be DIY trailer owner.
"Rapping"? Maybe we should call "Vanilla Ice" for advice on "Wrapping" on his HGTV show!
This first video about the worlds fastest wrap is interesting.
Here is another "How To" video on a wrap that gives you a good lesson in seeing what's involved. Watch the bottom video at about 21 minutes to see what's involved with compound surfaces such as a mirror.