Ok, so I had a look under my 4wds underbody the other day and it's got loads of rust spots starting. I've been googling loads about rust prevention and it seems my Trufield electronic rust prevention and regular washing isn't good enough for driving on the beach most weekends
I bought some Heavy Duty Lanolin and tested it on small section, it just attracts sand and dirt like a magnet, from reading forums it seems this isn't the best solution.
So far it seems Chemtech Fertan rust converter is a good start for treating my existing rust.
Then to stop it happening again there are two seemingly durable products coming out top.
1 - Penetrol (Paint Conditioner and Penetrol Aluminium), seems you paint/spray the conditioner first then the aluminium when that has dried.
2 - POR 15 (marine Clean, Metal Ready & POR-15)
Has anyone had any experience with these products and regular beach driving? How do you apply them without pulling your 4wd to pieces? Can this be done professionally?
Once the rust starts your never going to get rid of it completely, there will be internal rust that you cant see that will continue to destroy the vehicle. Just enjoy the vehicle and get the most out of it, if you really planed to have it forever you wouldn't be driving it on the beach every weekend.
there is no such thing as rust converter. once steel has oxidised there is no going back.
if you want advice i would suggest going to a few body shops and talking to them about your options.
I've heard some electronic rust preventions guarantee against rust, if they find it they fix it.
Perhaps this just applies to new cars
Not sure if it will be applicable but soda blasting the rust off will actually neutralise the action of the rusting, then seal or painted over.
2 cans of cheap matt black spray.
Spend 10 minutes and spray under the car on your chassis every 3 months.
That will slow the rust down, doesn't stay sticky for 2 months and collect sand and grime, and the car looks tidier underneath for a short while.
Some scoff at this idea and insist on only hand painting on heavy duty thick chassis paint. It my experience these same people generally never actually get around to doing the job 'properly' and the car gathers rust anyway.
Bottom line: 8 coats of quickly applied normal paint over 2 years is 100 times better than none.
mum and dad have had our landcruiser for 20 years now and when it was new dad sprayed underneath with fish oil. it now is black from being in mud etc. it did collect sand when he drove it on hot sand. we hose out underneatgh the car when we get home on the beach. there is practically still NO rust underneath the car and it has been on the beach for it's whole life. it has almost half a million k's on and still doesnt have any rust. we just had the gearbox, clutch and syncro in 2nd redone and now its all clean we will probably be spraying that too with fish oil when we get round to it.
Go the fish oil spray on with a cheapo weed sprayer maybe
i tried spraying rust cure but it does not last long - looks real good for a short while tho!, i reckon spraying the underneath of the car with the old engine oil would be messy but work well cos there is no rust around where my engine is leaking oil!
If you drive on the beach your car will rust.
You probably know this but dont drive your car in salt water. Someone else car is OK.
Electronic rust doesn't work. I had it on my old ute and it started rusting in 6 months (bugger drained my battery too while I was over seas.)
A mechanic friend advised me to park my car over the sprinkler regularly.
Take it to the car wash and blast underneath with hot water and suds.
Then take it to the car detailer. The buck toothed dude sprayed heaps of thick black poo under there for $99.
I need to do it again, but car is in getting a new clutch, spigot bearing, rear main seal, gasket behind the timing belt, timing belt and top + bottom radiator hoses.
Enough love for the wheels this year.
The Australian export paint might make a sale from me before xmas.
spray the lanolin on and drive on a dirt road (away from the beach) its this build up of dust and lanolin that keeps the salt and moisture out.
Cheers for the info guys!
Lots of people seem to have success with fish oil, just wondering if it smells?
I like the idea of driving on the dusty road to seal it.
Thomo, is your rust prevention the Coupler Tech Extreme heavy duty kit? I've got this one www.truseal.com.au/treatments-detail.php?type=521 I'm thinking I have a light use version, though hopefully it has slowed down the rust.
RAL INN, is this what you are talking about? Sounds good if it works.
Will see if the car detail guys can get the rust off to start by blasting it!
fish oil (fisholene?) is the go,
yes it smells.
The old fisholene smells like....well....fish.The ants love it.
I cant remember the name of the stuff I used, it is aussie made and has no smell at all.I bought it at Super Cheap Auto.
My last 4x4 I coated the whole undercarage in bitumas paint,
took ages,couldnt get a paint brush into hard spots(between springs etc)and had more of the sticky sh!t on me than the car....and it didnt do the job very well.
The spray on airesol fish oil is like sprying WD40 on a nut and bolt,,it seems to suck into it.So far its the best out of all the stuff I have tried.
The eternal battle of metal and rust.......the environment will eventually win
but you can slow it down