POR-15 the inside of the frame? - Defender Source
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  #1  
Old February 21st, 2011, 10:05 PM
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POR-15 the inside of the frame?

Since many frames rot from the inside out, I have been thinking about applying POR-15 on the inside of the frame (I have used it on the outside of the frame with good success). I realize one of the first hurdles would be how to prep it.... That said, I was thinking powerwashing it, but I have a feeling that would not be adequate... Anyways, I was thinking POR-15 could be applied via a spraying wand and a couple of coats could be a more lasting solution than other rust treatments. I know I may be totally out in left field with this, but any thoughts or suggestions?
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  #2  
Old February 22nd, 2011, 05:30 AM
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Waxoyl.

The problem with your POR15 idea is you need a clean, grease and rust free (neutralized) surface. If you spray POR15 inside all you will do is cover up that stuff and the POR wont stick. You need a wax/parafin based product for enclosed frames.
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Old February 22nd, 2011, 05:48 AM
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I agree with the Wolf. And a lot of hassle on an old frame that you can't see the inside of regardless.

See how long you actually hold on to the vehicle and you truly see signs of true rot. That may be years away and at that time, just get a galvanized frame and be done with it.
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Old February 22nd, 2011, 10:26 AM
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POR-15 outside, Waxoil or similar inside

I sprayed stuff similar to Waxoil inside my frame a few months ago. I plan on doing this on a yearly basis. I did POR-15 the outside of the frame, but that does not seem as permanent as I thought it'd be. Rock rash will require touch up (likely not with POR-15).
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Old February 22nd, 2011, 12:52 PM
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I've used this on the last couple of crossmember replacements as well as just spraying teh whole frame on a customer's S2A. No real measure of effectiveness, but it was easy to apply- comes with a rosebud tip on the end of the applicator hose so you can get 360* coverage.
http://www.eastwood.com/internal-fra...ay-nozzle.html
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Old February 22nd, 2011, 01:14 PM
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Quote:
Originally Posted by Roverlab View Post
I've used this on the last couple of crossmember replacements as well as just spraying teh whole frame on a customer's S2A. No real measure of effectiveness, but it was easy to apply- comes with a rosebud tip on the end of the applicator hose so you can get 360* coverage.
http://www.eastwood.com/internal-fra...ay-nozzle.html
I bought some of this as well and plan to use it when it warms up a little. I have had good success over the years with Eastwood products and hope to have the same with this
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Old February 24th, 2011, 03:48 PM
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Ziebart also offers a internal frame and cavity product and undercoating. Price I heard was reasonable
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Old February 24th, 2011, 07:50 PM
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Im not sold on ziebart or even waxoyl if rust is already present. I like eastwoods or por15. Eastwoods is probably how I will go (maybe also waxoyl) in a few months after a good powerwashing and letting it dry.

From researching the topic, some say that por15 actually needs rust to bond to in order to stick for the long term and to be most effective, and others say it needs a clean surface, so I am not sure what it needs to be effective.
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Old February 24th, 2011, 07:58 PM
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Quote:
Originally Posted by NoVaKevin View Post
.....some say that por15 actually needs rust to bond to in order to stick for the long term and to be most effective, and others say it needs a clean surface, so I am not sure what it needs to be effective.

I have used POR15 before. It needs a clean (grease/oil free) but rusty surface to bond well. Do not waste your time on a shiny smooth surface. It will just peel of in a few weeks. You gotta prep it well. Degreaser, metal ready, POR15, and maybe even an overcoat. Any exposure to UV and it will fade. Not important for inside the frame but in case you use it somewhere else.
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Old February 25th, 2011, 12:43 AM
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Quote:
Originally Posted by MUDSUX View Post
I have used POR15 before. It needs a clean (grease/oil free) but rusty surface to bond well. Do not waste your time on a shiny smooth surface. It will just peel of in a few weeks. You gotta prep it well. Degreaser, metal ready, POR15, and maybe even an overcoat. Any exposure to UV and it will fade. Not important for inside the frame but in case you use it somewhere else.
x2 coming from the jeep world. POR15 added many many years to my CJ's frame life, cleaned but with surface rust. Then a few topcoats of undercoating (after it had dried/cured)
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