4x4 Action Group

Let's hear what you guys suggest to use on my Syncro Chassis for rust prevention

From a resent Botswana trip playing in the Salty Muddy Pans at Kubbu Island have caused me alot of unnecessary headaches

Now other problem is my Syncro is a 1993 model
Nearly 30 years so a Classic that did not have all the new dipping technology

I pressure cleaned the chassis 4 times every time removing lots of Mud

Now nearly clean

What can I use to treat the chassis


I don't just want to paint the Chassis black but use something good

Fire away

Thanks for this thread. I'll look into the availability of the products we used on the aircraft for corrosion prevention. It was a 2 step process with the first being a very thin type of oil to penetrate between joints of materials. This is left to soak for some time and then the second liquid is sprayed over the area to seal it from moisture getting to the surface of the metal. This second one is a thick liquid that is normally thinned with something that evaporates very quickly. Both of these were from Ardrox but I can't remember the spec for the two.

Thanks Paul
Fire away and let's hear what the other guys have used before

I normally just use diesel. Put it in one of those garden spray things. Pump the tank up a bit and then spray it all over. The nozzle makes it easy to get it into all the little nooks and crannies.

The truck will smell like an oil burner for a day or two, but it works well. And also probably the only thing diesel is really good for...

I will suggest something that dries. Anything that remains moist will attract dust and become a mess after a while.

ABE makes a few products specifically for underbody protection. I have not seen a spray on variant yet but there should be one available.

Good luck!

Hi Pierre, this may involve a lot of PT, but I used this in my trailer build:

1) First coat of Duram Rust Buster NS1 (which chemically treats the rust and acts as a primer); then

2) A coat of Duram NS4 anti-rust primer; then

3) A coat or two of Hammerite.

Just make sure that you give the NS4 at least 48h to dry before applying Hammerite. Hammerite is easy to work with, if you intend to use a spray gun (Which I would recommend), you simply dilute the paint with 1/3 thinners - no need for hardeners.

The only downside is that it can become an expensive and time consuming endeavour - but it works. I have been using Hammerite for years now and it is one of the best anti-corrosion products on the market.

Some of the Ardrox products are very expensive because they are certified for use on aircraft by Boeing and Airbus as well as smaller aircraft.
I see that LPS-3 is locally available from a quick internet search which I have used at work and home before. I had bought it from the "scrap store" as it was time expired for aircraft use but fine for my application.
Another good product for vehicle chassis and the exposed underside of the vehicle is Dinitrol which is also a 2 step process for the application. First a water displacement liquid and then a thicker wax type liquid that forms a protective film on the surface on the metal. Dinitrol is also a product used on aircraft as part of the "aging fleet program" that was brought about to extend the life of the airframes. Have a look at these video links on YouTube. https://www.youtube.com/watch?v=dDl6CDjW0KI and https://www.youtube.com/watch?v=vX2m7iNVAfQ and https://www.youtube.com/watch?v=b1WNK92Nrck
WAXYOL is another good make of products for this application: http://www.cmcinternational.co.za/hardw ... ction.html
Hope this is useful to everyone.

Ive read of magical Linseed Oil applications
using thinning solvents ( parafine/diesal ? )
being liberally sprayed to the underside
but at far less cost than modern pricey “ muties ’’
… even applicable to case study Toyotas etc …

Linseed oil is brilliant for protecting the undercarriage....

...of Ox Wagons.

It's for wood.

Mad Manny wrote: ↑

Mon Jun 20, 2022 10:05 pm

Linseed oil is brilliant for protecting the undercarriage....

...of Ox Wagons.

It's for wood.

They spray a similar concoction at our West coast and it seems to work. The trouble with it is:

1) The dumbasses spray the exhaust silencer as well. When it heats up, your vehicle smells like a Boksburg woodshop;

2) They do not cover all the electric switches and plugs found in the undercarriage before spraying.

3) They prefer guys with Parkinson's disease to operate the spray nozzle.

Ricof4e, the guys at the Boksburg Mech shop do not have parkinsons, they have the shakes because they klap a bottle of Brandy daily…


Sent from my iPhone using Tapatalk

Most UK coastal areas actually use a concoction of Lanolin and deoderised fish oil if I recall. And they know about rust.

The first step in rust prevention is surface preparation. I have rebuild many oldies over the years. The is no quick fix for rust. Best is to have the chassis
sand blasted. Best results I had on a chassis were Stone Chip sprayed on.

jakeslouw wrote: ↑

Wed Jun 22, 2022 8:48 am

Most UK coastal areas actually use a concoction of Lanolin and deoderised fish oil if I recall. And they know about rust.

Lanolin is Sheep Wool Fat

Mad Manny wrote: ↑

Thu Jun 23, 2022 6:34 am

Lanolin is Sheep Wool Fat

Yep. Should be a lot of that in the Karoo.........