Rust, Rust, Rust
 

My poor 911S 75 is showing some rust (thank god only on some small areas) on the bottom of the car. Does anybody have some experience on how to handle rust problems and more important, how to prevent them?
I'm planning to scrape of the rust, put some rust prevention stuf on it, then some zinc spray and finally finish it of with some tectyl. But I am not sure if this will be sufficient. I have heard something about paint called bitec? It is supposed to be very good but almost impossible to remove. Perhaps I should ask a professional to fix it, but I'm afraid that will be expensive again.

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Joris
75 911S
http://members.xoom.com/joogie/Joogie.htm

One of the best sealer/primers on the market is PPG's DP40/401 Epoxy Chromate Primer ... it is a two-part epoxy paint that is mixed 1:1 and is ready to use after a short set-up time, and requires no thinner or reducer. It is very easy to use in an inexpensive $25 touch-up gun ... I have used it that way for many years, and recommend it without hesitation!

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Warren Hall
1973 911S Targa

Having gone through the rust thing with a 66' 912 and a more recently a 71 914; I know how you feel http://www.pelicanparts.com/ultimate/frown.gif

There are quite a few good treatments out there. What you must decide is do you want to stop the rust you see or do you want to go all out and eradicate any potential rust.

To go all out will require a lot of stripping and work that is best done in conjunction with a full restoration. If you just want to do a good "patch job" then I would recommend POR15 or compatible product. These treatments work very well if used correctly "i.e. directions are followed" and do not require the level of prep as power coating or galvanizing (both work great if you have the car stripped down to nothing)

In the end just pick a product that has worked for others and fits with the magnitude of prevention you are looking for!

if not doing a cut/ replacement of rusted area and on tite budget, after you remove
rust, try filling those holes with bondo
hair, it seems strong and tough!! after i am
up and running for awhile i will let you know
how it holds up... anyone had experience with
this product?? the stuff is about $8 a quart
and a little hard to work with, but seems to
be stronger than hell, drop a chunk on your garage floor and try to get it off.. anyone
know of any drawbacks besides not the "crrect" thing to use?

I live on the ocean in the Pacific Northwest and we have rust, no road salt but rust from too much rain! The first thing you have to do is get rid of the rusted area either cut it out or sand blast it to death, Warren was correct about DP-40, best primer around bar none. ALL of the body shops here use it on the daily drivers The hot rodders swear by it, but you have to get the rust off first or it's going to come thru.

After you've got rid of the rust, prevent it returning by getting a cavity wax into the area. Wherever moisture sits for long periods of time and also where salt and road chemicals get flung sooner or later rust will appear. I have just got some cut out of my '79 SC and don't want to go through the drama again so while the bumpers and fenders where off I sprayed cavity wax every where that moisture could get. I used a product called Dintrol (spelling ?) but I think they are all much the same. Also do inside doors etc.