indreland Posted July 10, 2015 Share Posted July 10, 2015 Hey guys I was looking into painting the underside of the body and the frame with Por 15 for rust protection anyone done anything like this to their comanche? Link to comment Share on other sites More sharing options...
91Pioneer Posted July 10, 2015 Share Posted July 10, 2015 Is it pretty rusty now? If not really, then POR15 is the wrong product. Use Fluid Film or something like that. An oil based rust proofing treatment is my #1 choice if it's not bad. Even light surface rust is fine for FF. If it's slightly rusty, POR15 is a good idea. Hint, the POR stands for Paint Over Rust. If it's extremely rusty (holes), fix the holes first, than POR15 :) Link to comment Share on other sites More sharing options...
Megadan Posted July 10, 2015 Share Posted July 10, 2015 Is it pretty rusty now? If not really, then POR15 is the wrong product. POR-15 can be applied to non rusted bare metal and work perfectly. The right prep work needs to be done to the metal, most notably the prep spray they sell, which is a mild acid used to etch the surface of the metal to allow the POR to properly adhere to the surface. Link to comment Share on other sites More sharing options...
indreland Posted July 11, 2015 Author Share Posted July 11, 2015 Yah it's not super rusty yet I just want to make sure that it will hold up for another 30 yrs Link to comment Share on other sites More sharing options...
Crash Posted July 11, 2015 Share Posted July 11, 2015 I have several cans of the Permatex Rubberized undercoating that I will be using on my MJ. I want to get stiffeners welded on first though. Link to comment Share on other sites More sharing options...
91Pioneer Posted July 11, 2015 Share Posted July 11, 2015 POR-15 can be applied to non rusted bare metal and work perfectly. The right prep work needs to be done... My point is I feel POR15 is used in a lot of cases where it isn't necessary. It's more money and a lot more work than regular painting or spraying oil-based rustproofing products if the rust is only very minor surface rust. I've had good success on minor surface rust (e.g. undercarriage, etc.) with KL-73 (a.k.a. Krown T40) and Fluid Film. They are both great choices if you have very minor rust. Using POR15 on those cases is like using a backhoe to get rid of an anthill. p.s. Undercoating is not the same as rustproofing. Over time undercoating can actually trap moisture and cause more rust than if you hadn't used it. Then one day some of it chips off and you're left wondering why it's all rusty underneath... Link to comment Share on other sites More sharing options...
Pete M Posted July 12, 2015 Share Posted July 12, 2015 where exactly is the rust? Link to comment Share on other sites More sharing options...
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