Epoxy garage floor paint...on a truck?

Fun idea. Beater pickup has lots of rust spots, peeling clear coat, dings. It will never be a show truck and the bed is rusting pretty good at the corners from years of wet leaves and crap and spots of body that I sanded down to metal are rusting through the primer. SO....I got a free gallon of garage floor epoxy coating and hardener and was wondering if this stuff sticks to metal? Nothing on the instructions says anything about metal application but I remember this stuff as thick and somewhat self leveling even with a roller. Only thing it says is the surface must be clean of ALL oil and silicone or it will fisheye or peel up. Idea was to wire wheel the bed to base metal and coat the bed floor and then run it up the sides if I had any left. Coverage is 2-350 square feet...Hmmm. Could I do the whole truck? I've seen entire trucks in rhino liner, doesn't look terrible as a work/4X4 truck.