Anybody have experiences with POR-15?

Joined
Aug 22, 2018
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WI
The truck has some bad body panels awaiting replacement and there will need to be lots of cutting and welding in the future.

As for the underbody, I had planned on eventually having it sandblasted and coating it with something like POR-15. But since it's paint over rust, and since I'm underneath the thing so much fixing stuff, I figured I could swab some paint over the rust as I remove parts to work on them. In sections as I go along.

Eventually the body would have to come off the frame to coat the top of the frame, replace body mounts and body rust, etc. But I figured going in sections as I'm replacing things anyway could be 2 birds with one stone.

Will this not work well? Should I be doing some higher level of surface prep instead of just degreasing/cleaning and then brushing and slathering it around literally all over the rust?
 

gofast

 
Joined
Jun 27, 2007
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Peachland, BC
POR15 likes texture. Just remove the loose rust.

The paint also can trap water underneath it.

Your surface should not have sharp edges where panels join or from flaking rust. Water will get under the paint at these points and can accelerate your rot.
 
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ewillis

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Oct 11, 2013
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Dante's Inferno, CA
POR 15 is a very thick/hard coating. It's way tougher than regular paint. I claimed hyperbole until I recently refinished my hubs with that stuff. It's expensive, but I will be painting various parts of my undercarriage with it as I'm impressed. Messy nasty stuff and the can sucks...
1903492
 
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Jan 6, 2012
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If your trying to clean individual parts of rust, electrolysis is a great way to do it. If your trying to clean sections of body of rust, I use wire wheels in a drill or grinder. Then I use rust converter to fix any specs of rust the wire wheel may not have totally have gotten. Then I use por15. I have heard that eastwood chassis paint is superior to por15. Also por15 has a tougher version called hard nose or something.
 
Joined
May 26, 2005
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Calrsbad, CA
You might consider the product Rust Bullet as well.

edit: I have used Rust Bullet effectively for a couple decades now for similar situations. I have not used POR-15, but reportedly Rust Bullet is easier to use than POR-15 with fewer overall procedure steps. I will make similar recommendations for using Rust Bullet (to those otherwise made herein in this thread for POR-15) for protecting your skin and preserving the expensive product uncontaminated in the can after opening. This stuff will stay on your skin for what seems like weeks and will easily foul the lid closure of the can if allowed to dry around the lid seal. I like gofast's recommendations above.
 
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Joined
Jan 3, 2011
Messages
35
Its really amazing..... Just do the prep 1st, wire brush and such then hide/seal it w por15...
Ive used it 4 times and it never disappointed me.
Ed
Oh PS cover yourself well bc tar doesn't stick/stain/have the permeant residue like POR 15...
Great stuff
 
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