is it a good idea to do a POR15 treatment on a frame in great condition? what about if you need to spend time up north on salted roads? is there a benefit to doing it before it hits the salt?
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so something from here?Many folks like it, but I have seen lots of cases where it doesn’t actually work or last very long. The potential issue with painted undercoat products is that if your frame isn’t perfectly clean and rust free before you start the process, it can actually seal it in and continue to rot from the inside without you knowing... it can even speed up the rust process in some cases. To truly do it right you’d pretty much want to strip it down to the frame, sandblast/etc, and start fresh.
Seems to be that oil based/wet application products like fluid film and wool wax are preferred and work great. I haven’t taken the time to do it yet, but I would probably suggest cleaning the underside (power wash & let dry) and using one of those rather than an undercoat paint. Oily metal won’t rust, and it allows it to “breathe” as it comes into contact with moisture and the film protects from salt/etc
If you’ve ever noticed on the underside of a vehicle that has small oil leaks, the areas that are constantly wet tend to be rust free, while there might be some rust on the dry areas. That’s how this stuff works. Typically you will need to apply it once annually, for example in the fall before winter and salt season hits, but seems to be the best option from what I’ve seen.
so POR15 you would pull parts if you wanted to do it right?Many folks like it, but I have seen lots of cases where it doesn’t actually work or last very long. The potential issue with painted undercoat products is that if your frame isn’t perfectly clean and rust free before you start the process, it can actually seal it in and continue to rot from the inside without you knowing... it can even speed up the rust process in some cases. To truly do it right you’d pretty much want to strip it down to the frame, sandblast/etc, and start fresh.
Seems to be that oil based/wet application products like fluid film and wool wax are preferred and work great. I haven’t taken the time to do it yet, but I would probably suggest cleaning the underside (power wash & let dry) and using one of those rather than an undercoat paint. Oily metal won’t rust, and it allows it to “breathe” as it comes into contact with moisture and the film protects from salt/etc
If you’ve ever noticed on the underside of a vehicle that has small oil leaks, the areas that are constantly wet tend to be rust free, while there might be some rust on the dry areas. That’s how this stuff works. Typically you will need to apply it once annually, for example in the fall before winter and salt season hits, but seems to be the best option from what I’ve seen.
Fluid film & wool wax are equivalent products, so the same process is used for both. Again, just power wash to remove dirt/mud/etc and then you can start spraying after it’s dry. You’re basically just covering the metal with oil.so POR15 you would pull parts if you wanted to do it right?
what about woolwax? can you apply it as the truck sits?
I agree with what's been said so far - the greasy products, if applied liberally and often will keep everything rust free.
Regarding POR in general, it's good - but there are better examples out there. There's commercial paint applications which are meant for 'marginally prepared steel', often used on bridge steel, and saltwater environments. Sherwin Williams Macropoxy 646 is a good example. It's an epoxy. With a commercial account you can get it for about $38 a gallon, and you need two (part A, and part B). It's tough as nails, and will adhere over a powerwashed undercarriage.
I did it on my 91 several years ago and it's holding up great in PA.