i wouldnt blast the whole van just blast lower panels most common place for rust is A pillar, firewall, sills, front floor pans, front of guards, lower front guards, lower rear quarters i also found rust at rear of rear inner guards normally if i find an escort without rust in floor pans or firewall it is a goodie they are the first to go floor pans are easy to get from palmside in chch about $75 per side they fit nice