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Hi,
A rust free 245 is definitely worth preserving. And it is by all means possible. My '87 240 has lived a life with salted roads and coastal climate and is *spotless* - absolutely no rust whatsoever. Two reasons, basically.
Firstly, the car has been kept clean -- always. Washed once a week, and waxed early spring, mid-summer and late autumn. It is particularly important to seal the paint before the winter sets in. Also in the door and hood/trunk openings.
Secondly, this car has been fully treated with Tectyl at a specialist shop every 3-4 year. The shop treats not only the undercarriage, but also the inside of every cavity, nook and cranny -- they follow an 80 points programme, unique for each car model. First time they drilled holes to get access to the inside. They have to keep the car for a couple of days as it has to be steamed and dried prior to rustproofing. This treatment has a price, but it has contributed in a big way in making a 15 year old car look like new also when viewed from below.
At http://www.tectyl.no/antirust.htm there is a simple sketch showing how the job is done -- on a 240! Tuff Kote Dinol is a very good product too: Pictures at http://www.dinol.se/, link no. 3 and 4 from top left.
When we occasionally get mild weather during winter time, I use to drive the car over the garden hose, attach the lawn sprinkler, and slowly haul the hose from front to rear while the underside is washed. (Could take an underspray at a machine wash, but I prefer washing by hand.)
Erling.
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