RE: Por 15

["Gary H." <62to65mopar@xxxxxxxxxxx>]

Good point. If the metal is structurally sound with surface rust you can 
 use POR or similar product that prevents FURTHER rusting. Otherwise 
replace the metal.

My understanding is that the key action these products have is 
elimination of oxygen reaching the rusting metal. No oxygen, no further 
oxidation. But you have to be careful: even a pinprick sized area that 
does not get covered by POR or its equivalent will allow air in and rust 
will continue under the POR etc.

I've coated the inside of some bumpers with POR about 15 years ago; the 
bumpers were pitted and pretty rusty before but today still show no 
evidence of rust coming back. I did the same to a part of the under side 
quarter area and after after several years had to go back in and  redo 
it as I saw rust bubbles under the POR. I missed full coverage is my 
diagnosis.

FWIW, there is a comparison article posted on the Eastwood Web site that 
compares POR to Eastwood's Rust Encapsulator. No surprise! -- the 
article favors Eastwood's Rust Encapsulator, but it is from a auto 
restoration magazine and is worth reading, imho. 

http://www.eastwoodco.com/jump.jsp?itemID=852&itemType=CATEGORY&code=1CJBAN8


Lastly, one trick on using the POR: drill a hole in the lid of the POR 
can and pour what you need into another container. Get a roofing sheet 
metal screw that is slightly larger than the hole you drilled and screw 
it into the hole you made in the can. The rubber gasket on the roofing 
sheet metal screw will, along with the remnant POR surrounding the screw 
hole, form a airtight seal for storage. When you need more POR, repeat 
the process with another hole.    

Gary H.
  


> ----- Original Message ----- 
 
> > On 10/28/07, Brian Safford wrote:
> >
> > And just remember that after you're all done, the rust is still under
> > there.  It won't get any worse, but it's not like this stuff turns it
> > back into steel. 


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