On any vehicle rust can be public enemy number one, but it can be kept at bay with a little help from my favourite Waxoil. Every year I spray the underneath with a 75 25 mix of Waxoil and old engine oil.
I have found the most severe rust points to be .
The steps under the cab doors,
The step of the sliding door,
Under the sliding door runner rail.
The gutter on the hinged side of the roof.
The Hiace has lots of little access panels that can be removed to spray waxoil between the inner and outer skin of the van. I have found an old tooth brush very useful for getting rust treatment such as killrust into hard to reach places.
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