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Old 04-23-2003, 11:54 PM   #1
watcher in the sky
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Member#: 3513
Join Date: Jan 2001
Location: NC
Vehicle:
1997 Legacy Outback
White

Default surface rust and ways to get rid of ...

Hey Hey guys, I just bought a used midpipe for a VERY good price, and the rust on it, is not bad, just surface rust, nothing near having the famed holes in it at all. Well, i was wanting to know..
Could I take a sander and sand the rust off, or will that be just wasting my time? Because im going to paint it with high temp paint, and just think it would be better if i got all, or most of the rust off.

Also, one other Q. The muffler i ordered is here, but i need some slight modifications to get it to work , so you all dont think that there would be any issues if i went ahead and mounted the midpipe with the stock muffler do you? I know it will mount, but dont know about what kinda backpressure issues if any will arise, or just anything.

Thanks, didnt know where to put this.

Justin
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Old 04-24-2003, 12:45 AM   #2
nySulli
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10% phosphoric acid and a small amount of rubbing will take the rust right off, or you can resort to using good old coke and a little rubbing, probably easier on both you and the exhaust, paint will hold very well to it, just remember to rinse off the coke
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Old 04-24-2003, 08:19 AM   #3
bigdweeb
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Yeah... I would remove the rust before painting it. You don't want to trap rust under paint if you can avoid it. If the corrosion is not arrested, there is a possibility it can continue under the paint and ruin your efforts to seal it.
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Old 04-24-2003, 11:51 AM   #4
ScoobArmada
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Whiter than Faded BRP

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I had good luck with a metal polish called Noxon from Home Depot for like $5. It seems like a mild abrasive with lots of anmonia in it. Pulled surface rust off with some rubbing/scrubbing using some Noxon, a rag, and occasionally a scotchbrite pad. Probably depends on how much surface rust there is for how well this would work vs. a more heavy-duty approach of sanding.
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Old 04-24-2003, 01:17 PM   #5
watcher in the sky
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thanks alot!
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Old 04-25-2003, 10:41 AM   #6
ImprezaVA
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Default Rust

Exhaust pipes rust from the inside out, so, if there is rust on the outside then the inside is pretty much toast. This is what I always thought, but I'm just a noOb.

-Charles-
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Old 04-25-2003, 10:53 AM   #7
watcher in the sky
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actually, that is true.. if there is water/moisture stuck in there.

Anyways, the inside of this midpipe is just fine, no sign of rust, just black goop from common use .
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