How do you suggest rust proofing a TJ?

I use Gibbs Lubricant.
Spray in all holes of the frame till it drips out.
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In Vermont we used to slightly dilute bar and chain oil with a bit of kerosene and spray it on with a suction sand blaster. Very cheap and easy to do. Something about that oil that makes it a great rust preventive. One gallon of bar and chain oil will do a few cars.
 
Regarding Fluid Film, how bad is the smell though? People are complaining quite a bit in reviews.

Like anything in life, its subjective. I got used to the smell. I compare it to the scent of an oiled baseball glove. It’s got like a leathery scent w a stink. Honestly, Im not saying Ive grown accustomed to the smell and like it, but because its been so useful and effective, the order doesn’t bother me. Certainly more pungent when you immediately apply it. For the record, Ive done all the application in my garage and I only notice it the day it’s applied. After, it’s not even an issue.


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Like anything in life, its subjective. I got used to the smell. I compare it to the scent of an oiled baseball glove. It’s got like a leathery scent w a stink. Honestly, Im not saying Ive grown accustomed to the smell and like it, but because its been so useful and effective, the order doesn’t bother me. Certainly more pungent when you immediately apply it. For the record, Ive done all the application in my garage and I only notice it the day it’s applied. After, it’s not even an issue.


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Agreed. I doused my underbody and frame real good and it only stunk up the garage for about 24 hours. After the propellant dries up, i.e. the evaporating volatile part of the solution, the sticky lanolin left behind doesn’t evaporate into the air any longer.
 
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The only true way to thwart rust is to avoid corrosive elements as much as possible. Air is the corrosive, other compounds like salt are the catalyst. Vermonters do not run their beloved vehicles from late fall to late spring and they keep the underside slathered up like a metroman's pompadour.
 
The only true way to thwart rust is to avoid corrosive elements as much as possible. Air is the corrosive, other compounds like salt are the catalyst. Vermonters do not run their beloved vehicles from late fall to late spring and they keep the underside slathered up like a metroman's pompadour.
Ain't that the truth! Fortunately, I am now able to store my TJ during the salty months since I bought a JK as a daily that can also get me through the Winter. Unfortunately, I now have to worry about protecting the JK the best I can! Time to get her cleaned, sanded, prepped, painted, and finally the slathering! I like to wait for those dry 85-90 degree summer days to wash out the frame, prep/paint etc.
 
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JK’s hold up so much better. Still, a neglected NE 2010 or older JK can have a lot of rust. But certainly, they hold up better than the TJ’s.


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JK’s hold up so much better. Still, a neglected NE 2010 or older JK can have a lot of rust. But certainly, they hold up better than the TJ’s.
This is good to hear. Luckily it’s a 2016 Willys with very little underbody rust since it was not from around here originally. I’ll do the best I can to stop the rust demons from here!
 
My son's JK spent a few years in NH. Those years put a deep oxide patina on the underside. We cleaned it well with a wire brush and put rust converter on it after moving south. That seems to have averted disaster.