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Old 07-13-2010, 09:57 AM   #1
Keith Tobberman
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Join Date: Apr 2010
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Location: Northern Maine
2007 Impreza 2.5i
Satin White Pearl

Default Corrosion Prevention

I have an 09 Impreza 2.5i. I live in northern Maine where the winters are snowy and road salty. I am going to have my car professionally undercoated to preserve its structure for a long while. I am curious though, how can I keep the bare metal components in the engine bay free from corrosion? I know WD-40 may work, but it seems to attract a lot of dust and makes things messy. What do you guys do, if anything to keep your engine bay free from rust and/or corrosion?

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Old 07-13-2010, 12:23 PM   #2
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Old 07-14-2010, 12:39 PM   #3
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2003 WRX Wagon


well, I lived up in the rust belt for a long time before moving to FL... regular cleaning of the engine bay to keep the salt off will be a good start and that's what I've seen most people do. I don't know if WD-40 is good or bad on different components, but it will make everything greasy and will smoke while burning off of any hot parts
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Old 07-16-2010, 12:47 PM   #4
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I've been told a good coat of WD-40 does a great job of keeping aluminum looking new. The subject of that conversion was how to keep "polished" aluminum from oxidizing, but I can't verify this as I haven't tried it myself.
There were concerns brought up about it being flammable, but several people came back saying it was perfectly safe.
I'd research it more if you're thinking of doing it yourself, but IMHO WD-40 is amazing.
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Old 07-16-2010, 01:05 PM   #5
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2006 Impreza Outback


Originally Posted by Big-E View Post
interesting, have any use with this?
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Old 07-16-2010, 01:21 PM   #6
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I think detailers domain sells some corrosion prevention stuff for under the car.
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Old 07-17-2010, 01:26 AM   #7
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Chapter/Region: E. Canada
Location: Toronto
2007 Impreza


oil spray the car, thats what i do every winter before first salt. undercoating is only the beginning.
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