Ours came the same way, (vinyl covered wallboard), I wasn't too thrilled about it so I went to a home improvement store and got heavy sheet vinyl. It comes in 4'x6' sheets and is made for shower stalls. It cuts easy with a utility knife and you use an adhesive made for the vinyl to install it. A little caulk for the seams and it's done. It took me about 2hours start to finish.
TT-2015 Cherokee 274dbh TV-2010 Jeep Commander Limited