Rust proofing the frame

[4wheelgreg]

You could also consider painting it first , once you put a oil /coating its pretty difficult cleaning a frame that is all coated .
Even my 2019 that has never seen a hard day of snow / salt shows signs of small rust spots .
I am just getting started on mods , before I put my Bud Built running boards I’m going to paint behind and on top of the frame rails before mounting up the boards .
And as others pointed out its a boxed frame , you just hope Toyota did a good job on the painting inside , but I don’t think they did , I think they did a quick dip and done.

 

[2021 LC200]

Rear wheel bay and top of frame weld with some initial brown rust spots:
View attachment 2598137

Front tow hook attached to the frame:
View attachment 2598138

On the weld rust spots I ended up putting some rust-oleum rust reformer. Will see how it holds up and report back in due time.

 

[4wheelgreg]

Have not tried there rust reformer , but I have tried there self etching primer and I am pretty impressed , I used the rattle can on some aluminum parts and as a base primer has held up well for a few years I put on then a raptor liner stuff is a poor mans bed liner stuff but these were just small parts and did very well .
I will have to give this stuff a try !

 

[turbo8]

I sorta knew the bump stop area of the frame was a place for water to collect. Here is what inside of them looks like. Soak the bump stop threads with penatrating oil before attempting to remove.

 

[vmfire]

Waxoyl Hard Wax is what I use on all my vehicles. We are in upstate NY in the Salt City.
I have run Tundras to almost 300k without frame rust.

 

[04UZJ100]

What can someone do aside from a wax coating to prevent rust buildup in the bump stop stubs? Drill a hole through the bump stop and parent mount?

 

[AnalogCruiser]

I saw NH Oil and it looks promising. They have a lengthy product info on YT. Will try it this fall.

 

[dcs111]

On the weld rust spots I ended up putting some rust-oleum rust reformer. Will see how it holds up and report back in due time.

View attachment 2609207

I just bought some of this… curious how often are you re-applying? Is it keeping the rust from reoccurring? Thx!

 

[Lou Gill]

NHOU I have 2013, live in WI and it works great, they spray the black on the underbody and the clear in all the doors and drip holes it’s needs to be reapplied every 3 years or so.

 

[PDoyle]

WoolWax has a new product I want to try.
Here’s a vendor-

Hard-On by Woolwax™ 1-time permanent coating.

Hard-On by woolwax™ is for that application where a permanent coating corrosion protection coating is needed, or preferred, over a maintenance type application that needs to be recoated every couple of years. Hard-On by woolwax™ is a high performance, water based permanent 1-time hard shell...

forum.ih8mud.com

 

[m4dm4x]

Has anyone tried Corrosion Free Rustproofing out of Canada?

 

[Heritage 2020]

I don’t think of Houston as an area where rust is an issue (unless you ride on the Gulf coast beaches a lot which entails rinsing the undercarriage thoroughly).

That said, if you decide to coat—definitely don’t go with a rubberized coating that makes things worse than imaginable.

The mechanic in the video likes fluid film, but not Ziebart(r) style or paint coatings..

NOTE: Some years ago while on business, I looked at a “bargain”4Runner for sale in Chicago that looked black/pristine underneath, but when scraped at flaked off like in the video. That mentally scarred me against northern vehicles forever.

 

[GeorgeN]

Hi all,

Have a 2021 LC200 (base model, blizzard pearl, black) coming, should be delivered first or second week of November. I am pretty excited and count myself lucky.

Any recommendation rust proofing the frame?

Would like to drive this vehicle for 10 if not 20+ years and on occasions take it on the beach. Searching online/youtube vids I read/hear rubber coating may not be a good way as water can get under it. Fluid film and Woolwax (best of the two?) seem good products.

Any experience or recommendations? Beside the outside and inside the frame... should I spray the rest of the underbody and axles etc.? Should i spray a transparent wax like fluid film or wolwax (comes in black or transparent) in the bottom of the doors and the back door?

Or not bother as the factory coating and anti corrosion system is top notch and rusting through the frame is a non issue?

Your thoughts/experience please?

Thanks a lot!

3M Cavity Wax for the inside of the frame and Amsoil metal protect HD for the outside of the frame work well

 

[2021 LC200]

Back to the subject of frame rust and frame rust proofing on a new LC200.

So before I give an update and ask a question to owners of recently build LC's:
- My overall sense on this subject is that I am "splitting hairs" or dealing here with say a "first world" problem
- Also take the point that in the South of the US (Houston) frame rust is of less/little concern and that UV exposure to paint and interior is probably going to do more damage from a vehicle longevity point of view, although I typically keep the LC in the garage or have it cover parked at work.

Update
Since I took delivery in December of my 2021 LC200:
- I bought a couple of bottles of DuPont Non-Stick Dry-Film Lubricant with Teflon Fluoropolymer (right, the nasty teflon which you should not use to cook on) and spend some time laying under the cruiser to spray it in the frame for as good or bad as that can be done using some extended length spray straws.
- Why this Dupont product? Well, I guess I made a choice... Of the various products to add some additional protection on a newly coated frame I chose this as it dries up slick and should let any debris or water run off easily compared to more sticky rust proofing sprays.
- After (quite...) some effort spraying this into the frame I must say I think I achieved little compared to the coating already applied by Toyota or the frame supplier, nor did I probably do much harm. Oh well...

Remaining Question
- While laying under the car in December and looking at it again today, I see some small rust signs on the outside of the frame at the edge of the welds. I does not appear the primer or base coat used on the frame. I am just surprised this being the case from day 1 with a vehicle build new in Japan in October 2020.

My question to owners of recently purchased "zero mile" vehicles; Do you have the same (minor) initial rust on the welds of your frame or not?

Thanks a lot!


Rear wheel bay and top of frame weld with some initial brown rust spots:
View attachment 2598137

Front tow hook attached to the frame:
View attachment 2598138

This video shines some light on the brown color seen at the frame welds. While by now I have sprayed most easy accessible with Matt Black Rustoleum Rust Reformer, this appears not to be rust. Nice to know.