if it were me i would grind off the rust because i have no way to get to a sand blaster, then i would paint it with some trim clade rust paint, then throw down a chunk of dimond plate with rivits, then bed line it it would look good and all your rust problems are gone.
thats what i would do. at big horn sheet meatal in canmore dimond plate is 2 buck a square foot i get a good deal though work but i'm sure you chould get it cheap some were.