How much surface area is there on the hulls of a catamaran Like an F16, or F18?

I just got done reading this: http://www.kirkhammotorsports.com/book_aoe/

Chapter 18 goes over the buiding of the aluminum body for a AC Cobra replica that Larry Ellison had built. Read the whole thing as its really fricken cool. Looking at the body made me want a polished aluminum catamaran, just wanted to take a wag at what each hull skin would weigh. The curiousity is overwhelming.