The VX was not designed for towing. It can but was not designed for it. The more points of attachment you have and the wider the attachment points the stronger the hitch. So since the VX has only 2 predrilled holes in the fram and no predrilled holes in the bumper you are going to have to drill or only use 2 holes and bolts to attach the hitch and lose capability. As for rust I would suggest treating the holes after drilling then treating the whole are after attaching.