Hi wondering what everyone is using for rust paint on the underbody?
Thanks
Thanks
navy02ws6
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Apr 28, 2026
POR15 usually does a good job.
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POR15 is what I used. I'm sure there are others out there as well too.
Drew
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Apr 27, 2026
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POR15 only bonds to rusty metal. If you only have light rust, and remove most of the red oxide with a wire brush or sandpaper, then apply POR15, it'll peel right off. It almost has to have a nasty pitted surface to really adhere. Maybe it's just me, but most of the places I used it after scrubbing away the worst of the rust, it just peeled off later. Rattle-can Rustoleum seems to work nearly as well, assuming the area isn't something that has to look fantastic.
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RustSeal
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Quote:
If you use their metal prep prior to painting you can paint on clean rust free metal. As far as I know it etches the surface of the steel.Originally Posted by Drew
POR15 only bonds to rusty metal. If you only have light rust, and remove most of the red oxide with a wire brush or sandpaper, then apply POR15, it'll peel right off. It almost has to have a nasty pitted surface to really adhere. Maybe it's just me, but most of the places I used it after scrubbing away the worst of the rust, it just peeled off later. Rattle-can Rustoleum seems to work nearly as well, assuming the area isn't something that has to look fantastic. 
