How well has your por 20 exhaust held up?

Boonies

Going to be getting a new header for my beetle but it will only be an intermediate until i build a bigger engine. So i don't want to spend the coin on ceramic coating on something that will be replaced. Just wondering if anyone out there has pics or experiences with exhausts coated with por 20 on car that are driven rain or shine.

thanks for any info
ccp
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RIS · Posted: Sat Sep 29, 2007 7:58 am Post subject:

Used POR 20 on a 1 3/4" header on my car (which was driven rain or shine) and it did not last more than a year before showing surface rust in the collector area. After 2 years the only POR 20 left was on the lower part of 1 & 3 pipes. The pipes were new when painted and were completly stripped to the bare metal and prepped according to the instructions on the can.

If you want a coating that lasts invest in Ceramic.
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krusher · Posted: Sat Sep 29, 2007 12:05 pm Post subject:

I used it and it lasted 3 months before looking bad.

Crying or Very sad

hpw · Posted: Sat Sep 29, 2007 6:08 pm Post subject:

Image may have been reduced in size. Click image to view fullscreen.

Sand blasted and 2 coats of por20
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hpw · Posted: Sat Sep 29, 2007 6:17 pm Post subject:

http://www.thesamba.com/vw/forum/viewtopic.php?p=2482645&highlight=#2482645
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Kelley · Posted: Sun Sep 30, 2007 12:16 pm Post subject:

POR-20 lasted less than 3 months on my A1 muffler, actually the bend before the muffler. I thought I was meticulous in prepping the surface before applying, looked great for about a month, then, I guess, the exhaust heat got to it. Now it looks rusty, although the muffler is still in good condition.

I might reprep and try naval jelly on the surface rust. I'll post a pic soon of what the muffler looks like currently.
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Boonies · Posted: Tue Oct 02, 2007 6:31 am Post subject:

Well good to see that no one has had a good experience with this stuff. Don't plan on going ceramic on this header so ill just live with some rust.

thanks
ccp
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The Old Speed Shack

bciesq · Posted: Tue Oct 02, 2007 7:03 am Post subject:

I have a Danish replica of the '74 Thing muffler (translation -- it started rusting minutes after I removed it from the box).

I've started using this:

periodically and it seems to keep the rust in check. It's definitely not one of those apply-it-and-forget products, but if you don't mind adding a chore to your valve setting regimen, it's a cheap alternative that dries to a nice flat black.

Application tip: use bleach to clean your hands afterwards -- nothing else works.
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juki48 · Posted: Tue Oct 02, 2007 9:17 am Post subject:

Randy in Maine · Posted: Tue Oct 02, 2007 9:31 am Post subject:

These guys have a high temp powdercoat that is supposed to be good to 1000º. I may have them do my thunderbird header http://www.awesomepowdercoat.com/colorsamples.html

bciesq · Posted: Tue Oct 02, 2007 10:04 am Post subject:

nextgen · Posted: Tue Oct 02, 2007 10:48 am Post subject:

POR is the best stuff I have seen but, it still does not last. Cermic is better but stainless is the best. But even with the stainless I had a very ugly discoloring. So I used the POR on the muffler part that was discoloring and left the exhaust pipes alone. That has been working for 5 years.

http://tunacan.net/t4/owners/joe-cali74/

You can see the one with the car cover with the POR and the earlier photos without.
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Boonies · Posted: Thu Oct 04, 2007 4:49 am Post subject:

So Joe how long does that last before you need to strip the exhaust and reapply?

ccp
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vdubyah73 · Posted: Thu Oct 04, 2007 4:58 am Post subject:

I used the stove polish on my 72-74 stock dansk typeIV muffler. It was turning into ash white flakes in a matter of days.

Bill
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