Does anyone know any (affordable) bodyshops in Essex who can treat some rusty arches. The last bodyshop I used appeared to have done a decent job but 2 months later the rust is already back..
If the metal of the arches is perforated then the only way you're going to prevent a recurrence is to have new metal welded into the area. Just putting a bit of filler on & painting over the top isn't going to last.