Dinitrol or similar

[patrickr90]

Hi

I'm thinking of using Dinitrol to protect the underside of my 1986 Ninety. However, it's fitted with a galvanized chassis and I want to keep that bare as I like the look. Dinitrol seems to be mainly a spray product so, apart from doing a (possibly fiddly) masking job undereath, is there another equivalent "paint on" product that will do a good job. I've used black Wax Oil on a previous vehicle.

Thanks

 

[tottot]

Simple solution is to use a clear wax. Even the galvanized chassis will benefit from the protection. They do corrode but just a lot slower than painted steel and a coating of wax will help keep the look you like.

 

[patrickr90]

Simple solution is to use a clear wax.

Thanks. There's quite a bit of surface rust on the axles and in the wheel arches. I'll wire wheel the worst off but won't a wax let this show through - I mean will the finish be good?

 

[tottot]

Hand paint the black wax/paint the axles.

 

[Anaconda]

Dinitrol do a clear wax you could use.
Take the rust back on the axles as much as you can, use a rust converter then paint them. You could spray with a wax if wanted afterwards.
It all needs to be very clean before applying anything though.
Don't forget cavity wax inside box sections, also the bulkhead.
Have fun (actually you won't as it's an endless chore but atleast you are halfway there with the chassis)

 

[patrickr90]

Dinitrol do a clear wax you could use.
Take the rust back on the axles as much as you can, use a rust converter then paint them. You could spray with a wax if wanted afterwards.
It all needs to be very clean before applying anything though.
Don't forget cavity wax inside box sections, also the bulkhead.
Have fun (actually you won't as it's an endless chore but atleast you are halfway there with the chassis)

Thanks for this. Is there a good rust converter? Painting the axles: I thought about using Hammerite Under Body Seal which also contains Wax Oyl....

 

[Anaconda]

Hydrate-80 - Bilt Hamber

Hydrate-80 is a rust converter which provides unparalleled protection to rusted steel surfaces.

bilthamber.com

I prefer these products, as slightly cheaper and seem just the same.
Axles and mechanical parts use paint, Hammerite is easily available, not sure why you would use underseal on them.
Paint them and use whatever clear wax spray you choose to use.
Then each year or so give it a good clean and do it all again.

 

[tottot]

Just do not use that bitumen based thick black underseal anywhere. In time it cracks and water gets in behind and there is hidden corrosion worse than a bare chassis.
When asked to inspect a vehicle with that stuff on it shiny new or other wise I will just walk away.

 

[dag019]

As @Anaconda says, Wax is the final treatment not the only treatment. If the axles, and other things are rusting they need the rust removed (wire wheel or similar) treating with a rust converter/stabiliser, painting with primer (I like red oxide for steel, zinc 182 for galv, a quality etch primer for aluminium), painting with a top coat (I used black tractor enamel on my axles and chassis brackets), and then wax over the top of that (I use dinitrol 4941for the outside of my underbody, but this is black).
As mentioned above if you want to keep the galv chassis "bare" there are clear wax available, I believe lanoguard is clear but have not used it personally. But I would seriously consider painting the chassis. My glav chassis is now 15 years old and I regret painting it when it was fitted. There are areas that were showing surface rust on the body swap I did where they had not been waxed as were inaccessible.

I believe @lightning used a clear wax on his new defender, he might be able to give some recommendations and real world experience for how long the treatment lasted.

 

[lynall]

Any chassis wax well worth adding 25 ish percent hydraulic oil, makes it creep better and keeps it soft for ages.

 

[Anaconda]

Lanogaurd is a semi clear brown finish I do believe. Dinitrol do a clear version of their chassis wax and Bilthamber might also do one.