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Discussion Starter · #1 ·
Any thoughts about undercoating rust protection on an older vehicle?

Good idea? Bad idea? Waste of money?
 

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Going Postal
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I think its a good idea. Is the rust already there or are you just trying to prevent it?



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Definitely do it. Rust is easier to prevent than to stop. It's no fun to fix rusted out body panels either. I would suggest using some Por 15, I've heard really good things about it.
 

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Discussion Starter · #5 ·
Nope, no rust underneath. I brought the truck back from Colorado where they don't use salt to St. Louis where they LOVE salt so I'm trying to protect it as much as possible.

I guess I'll scrub and treat as much as possible. Any areas seem to be particularly susceptible that I should concentrate on?
 

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insides of fenderwells, and floorboards where your feet go are the worst offenders, I think.
 

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Bottom rear of front fenders (usually from trash building up behind the fender), rockers, 1/4 panels around the wheelwell, and the rear floor by the tailgate. And the places AJ also mentioned.
 
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