surface rust

Fisholine--available at Bunnings.Leaves a smell that will dissapear in a few days.It is very good stuff.

Yes Fisholine works well. I still got my HJ47 81 mod and it has very little rust. I used to spray mine every year and do the same with my new one.

cheers
Reiner

If you want to do a proper job buy yourself some "Deoxidine 624" from an Automotive paints supplier and apply as directed. Then if you can actually get near the rusted areas give it a spray or brush on some cold gal paint. If not then the fisholene would do the job for you. The Deoxidine will kill the rust and passivate the surface. I don't advise the use of the spray on bitumen type paints on older chassis that may have hidden rust as the rust will love the atmosphere under the bitumen and the situation will deteriorate.
Corrosion is a hobby horse of mine, had vast experience treating it in boilers where it does tend to be worrysome.

Penetrol amuminium is excellent, I paint the stuff directly onto rust and it is supposed to last 15 - 20 years. If you get 5 to 10 thats fine. It seals the rust out and does not allow contact with air or water. I have yet to see rust get through that layer.

Agree with the one above.
Penetrol on the rust, and I use fish oil as a general deterrent.
Friend used to have a hose set up for his compressor with a 180 deg spray nozzle on the end. We used to drag it through all of the chassis members.
Then a good general spray around underneath.
Add a bit of diesel to make it go further and penetrate better.

PS - wives love the smell of fish oil and fish oil burning off a hot exhaust!
Really turns them on - to some one else.