undercoating

[Mook]

What is the best treatment for rust on the undercarriage (rubbarized, fluid lubricant, rustoleum paint, ...)? Rust developing near swing arm and near wheel.

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[Chocolyle]

POR15. Never worry about it again.

 

[just_another_guy]

I went with a wax-based undercoating (woolwax). It's messy as hell, but I think it's the best long-term approach

 

[LostWoods]

Best approach I've seen is some POR15 painted into the gaps and corners were the frame is assembled and then Krown every winter. Had a friend who put his truck through multiple Pittsburgh winters without a speck of rust underneath.

 

[dakota.morgan91]

Hands down a coating like POR15 or CR, then applying a wax-based on top, like fluid fil before every winter. It is probably a bit more work but you are guaranteed ZERO rust.

Also as a side note, in this realm, Youtube is your friend. There are a few great channels out there running long-term tests on different undercoatings and their performance.

 

[Mac]

Fluid film applied every fall, cheap, easy and available at the big box stores.

 

[Gvsukids]

Underflush at the tunnel carwash.

 

[Dqban]

move to florida for the winters

 

[sdk131]

Amsoil Metal Protector HD (dries like candlewax on clean surfaces and will not rinse off) for a new clean vehicle. Fluid Film or Wool Wax spray after that. Fluid Film and wool wax spray work great but never dry, can rinse off over time and attract dirt/dust. Good part is you can always just spray more on after a quick rinse with the hose to get the bulk of the dirt off.


NEVER on any rubberized undercoating/bedliner. One tiny crack could let moisture in and will allow rust to fester under the surface long before you even notice,

 

[jeepin48]

On my new 2021 I plan to throw on another coat of enamel spray paint and wait until fall an do Fluid film. The factory frame paint barely covers the corners so I thought I could add a little more chip protection while keeping in mind that fluid film will soften rubberized paints, hence enamel.

 

[Mac]

They have black fluid film now, might be easier than painting and then using FF

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