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From: gvcormack@watdaisy.UUCP (Gordon V. Cormack)
Newsgroups: net.auto
Subject: Re: new car rustproofing?
Message-ID: <6744@watdaisy.UUCP>
Date: Sat, 17-Nov-84 09:47:11 EST
Article-I.D.: watdaisy.6744
Posted: Sat Nov 17 09:47:11 1984
Date-Received: Sun, 18-Nov-84 03:38:09 EST
References: <1144@bbncca.ARPA>
Organization: U of Waterloo, Ontario
Lines: 31

Consumer advocates in eastern Canada generally agree that there is
no permanent rustproofing that does much good;  these compounds are
all too thick and the moisture gets into the seams and cracks 
underneath them.

The same advocates agree that having thin oil (engine oil will do)
applied every year is much more effective.  The car is drilled and
sprayed in much the same places as the permanent rustproofing
(rockers, doors, fenders etc.).  The oil is more effective because
it creeps to the same places as the water would and is, of course,
hydrophobic.  Unfortunately, because it is thin it evaporates/ runs
off after a year and needs to be re-applied.

In waterloo you can have this done for twenty bucks with about five
bucks extra for the initial drilling.  Over the life of the car this
is not significantly different from the "permanent" treatment applied
once.  There are also commercial treatments that use the same
principle (notably Rust Check) and give a 1 year guarantee renewable
ad infinitum with annual treatments.  These treatments cost 3 to 4
times as much as straight oil.  I suspect you are paying for the
guarantee and national ad campaign.  Still, $5 per month is not a
lot to pay to protect your car from becoming a pile of rust.

One last note, you can begin spraying an old car with oil at any time
whereas the permanent stuff is generally only applied to new cars.
I have never tried to oil a previously permanently rustproofed car
but suspect the old rustproofing might interfere a bit.

Hope this is of help to someone.

Gord Cormack, University of Waterloo