This reply is only slightly related, but might be helpful...
one of the magazines recently had something about graphics on boats. they cautioned that graphics at the waterline take a lot of abuse (from the constant "abrasion" of the water). I would definately want to use a laminate, or at least the Frogskin or Abrasion Protection foils to protect the graphics.
Beyond that, yeah, I'd use the Controltac. Its worth the extra $ to save on the time spent installing.