Just looking for what is the latest (or old but best) ideas on what to spray/pour inside the HK's quarters, doors and other hidden nooks before I seal it with interior. I know I can get to other spots later (like access from the boot area, or spray into the sills from clip holes or drain holes) but some of it is best done now while there is zero trim in it other than the headlining. What i'm talking about is mainly behind rust repair sections especially areas like in the quarter between the door and the wheel.

In years gone by I've used fish oil and Tectyl, but this was over 20 years ago, only had new cars since. My HJ Premier was done by James Rustproofing in Newcastle when it was new and it has never had rust and been a coastal car all its life, so whatever that was it must have been good!

On my hatchback I used Fertan (phosphoric acid) and let it dry, this was to convert any surface rust that may have been lurking, then fish oil. But the car stunk for months. Having said that though this Monaro won't be driven for another year at best, so the smell should go by then if fish oil is the best.

Any suggestions?

lanolin and fish oil have been used for many good products. lanox is excellent for rust proofing and lube and is basically made up of those two ingredients. add that to bitumen and sounds like a product our dads would've bought back when... 5lt looks like it's worth a try. saying that after I rust repaired my van I coated it with bitumas black, which is used for sealing water tanks and retaining walls.

Edited by user Tuesday, 10 July 2018 7:11:46 PM(UTC)  | Reason: more info

Penetrol maybe good for un rusted steel.
I have no rust in any of my cars.

But there was a product a mate used for his old HK Monaro it went over and sealed rust in he said, so you cut back what rust you could and the little bits that you could not truly deal with, you hit it with this stuff, but it was very expensive, his 2ed car he did he asked to use that same stuff and the dude doing it refused said it was to expensive, mate said he did not give a fook but old mate refused saying what he was using was good enough.

My HG Ute was done with Fisholene back in 1970 according to the 2nd owner. He bought it when it was 11 months old in 71 when his work mate couldn't afford the repayments and immediately hit the rear quarters, doors and guards with Fisholene. The only rust I found in it was under the rear screen rubber and that was repaired about 9 years ago.
I have used 'Fish Oil' which I think is not the same as 'Fisholene'. I have no idea if it is as good as Fisholene though. Anyone else used Fish OIl?

I Have a HT. I've had it for 25 years. I live near the beach too (walking distance) and I surf so the car gets plenty of salt air. Ive only ever used fish oil. My car was stored for over 12 years until recently and i didnt touch it in that time. When I pulled it out to put back on the road, I couldn't believe it. Absolutely NO rust anywhere. I pulled off the door cards last year to re apply the fish oil. No Rust. I usually block up the drain holes for a couple of weeks before clearing them. (Put a bit of cardboard down underneath the drips) I have also drilled a bigger hole under the scuff plates to allow spray to get in the sills. Yes, it stinks for a few weeks but so what?? I use 2 cans on the car, do the undercarriage, Y frames, inside the dog legs from the boot and I dont skimp. Why would you when to rust proof the car costs less than $15? I do this at least once every 2 years.
Alby

Plenum bad bit is two layers. Originally they put a line of sealant close to the plenum chamber where you can get you hands into and whacked the cowl on top meaning no body dip or paint made it into the very ends (closest to the doors). There is a small gap in between the cowl and plenum panels, maybe 1-3mm. If you drill a 3mm hole or two in the vertical section of the cowl panel next to the door, that is revealed when you open the door you can squeeze a “straw” in there attached to a pressure pack nozzle (like some come with) and spray into that area. If done right the straw may even be able to be pushed up into the gap between the panels. Once all settled down seal the holes with some sealant and if needed touch up with some paint daubs.

It’s about the best you can do with an original one.