rust treatment & seling for underneath of 4 x 4

Submitted: Wednesday, May 24, 2006 at 18:08
ThreadID: 34221 Views:3200 Replies:7 FollowUps:4
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I have discovered that fine pitting on the underside of my GU patrol is starting to develop specks/evidence of light rust.

Hardly surprising as it has done most of its distance on dirt travel + beach use. When at the beach/sandhills, I hose it down underneath when I return that evening. All that grit/rock/stone has blasted any protectorant off & now.....

I need to stop the rust & ..................
I need to reseal

Any suggestions?

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Reply By: Rick (S.A.) - Wednesday, May 24, 2006 at 18:13

Wednesday, May 24, 2006 at 18:13
Where's that spell checker when you need it?

Title should have been SEALING for underneath the fourby
AnswerID: 174506

Follow Up By: Michael ( Moss Vale NSW) - Wednesday, May 24, 2006 at 21:07

Wednesday, May 24, 2006 at 21:07
Gee!! i cant find the spull chooker!!! Lucky ima good spuller!!
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FollowupID: 430641

Follow Up By: Gerhardp1 - Wednesday, May 24, 2006 at 22:52

Wednesday, May 24, 2006 at 22:52
Whats a goods puller?
FollowupID: 430657

Reply By: Willem - Wednesday, May 24, 2006 at 18:21

Wednesday, May 24, 2006 at 18:21
G'day Rick

I would paint it with some Killrust and then when thats dry slosh some Pabco on(the stuff you paint rainwater tanks with).

No doubt there are far more technical ways to do this so will wait to see what other replies are forthcoming :o)

AnswerID: 174509

Reply By: Maddmav - Wednesday, May 24, 2006 at 18:41

Wednesday, May 24, 2006 at 18:41

I used an underbody paint sealer I bought from Supa$hit Auto.

Comes in 1 or 4 litre, I simply got under the truck with the water-Jet blaster and cleaned all down first then after a run around the block to quick dry sprayed all under - chasis- diffs - floor pan etc. Took a couple of hours.

Been on for over 12 months and all good. The only thing I do though is spray the under-side of the chasis rails after a few trips up bush - where rock scrapes happened along the way.

AnswerID: 174514

Reply By: glenno(qld) - Wednesday, May 24, 2006 at 18:50

Wednesday, May 24, 2006 at 18:50
Half sump oil and half diesel . Put it in a rega 9 litre garden sprayer and spray underneath .
AnswerID: 174517

Reply By: Mikee5 (QLD) - Wednesday, May 24, 2006 at 19:13

Wednesday, May 24, 2006 at 19:13
Hi Rick,
I rang the guys at Hervey Bay who hire the foubys out that go to Fraser when I was researching this for myself last year. They reckon that Fish oil (Fisholene) is the best. They strip out the whole interior and spray inside and out. I used Valvoline Tectyl myself on a troopy I just got rid of - it was 26 year old and still had very little rust even after going to Fraser several times each year. The secret is to be vigilant/neurotic and re apply what ever you use as often as needed. I have gone for Ming on my new 100 Series whic was about $500 from memory and for about $30 a year they touch up any worn proofing.

AnswerID: 174523

Reply By: Toytruck - Wednesday, May 24, 2006 at 21:24

Wednesday, May 24, 2006 at 21:24
I use 50/50 Tectyle and Fish Oil. My 60 series was swamped in this when I first got it and to this day there is only one spot of rust under one of the rear doors about the size of a 50 cent peice. Problem is though, when its a hot day it runs from the roof lining down one of the rear pillars. Not much of a sacrifice though considering the protection. I am about to do my 100 series in the same. Might go a little easier in the roof lining on this one.

Must admit though, have never been much of a beach/sand/salt person in any of my vehicles.

AnswerID: 174551

Follow Up By: Rick (S.A.) - Wednesday, May 24, 2006 at 21:54

Wednesday, May 24, 2006 at 21:54
How did you apply it?

Did you blast it clean with a pressure systen first?

WILLIE - thansk for the response.

I too had thought of a bituminous product, but wanted an opinion before I formed a conclusion. I have used that stuff, or similar, on all sorts of jobs when I was living in the bush. Another brand was Bituminoid, I recall, very tack & hard to apply if the weather was a tad cool.

FollowupID: 430647

Follow Up By: Big Woody - Thursday, May 25, 2006 at 08:07

Thursday, May 25, 2006 at 08:07
I agree with Toytruck,

I have been using 50/50 Valvoline Tectyl and Fishoilene for about 20 years on my 4by's. It does run out on hot days but that is better than rust.
I apply it using a degreaser gun with the flexible hose and pull off every trim I can through out the vehicle and go for it.

Warning, do not apply it just before you go to Fraser Island.
Wait until after your trip so it has a chance to harden up a bit before your next trip or you will have a sandpaper type finish under your car that will never come off.

Under the car and in the chassis I use straight Tectly as it sets a bit harder.

FollowupID: 430683

Reply By: Trevor R (QLD) - Wednesday, May 24, 2006 at 22:39

Wednesday, May 24, 2006 at 22:39

I have passed this post ID to Member Andrew (up here in Brissy) as he has not long ago sealed the underside of both his trucks for this reason, but I can't remember the name of the product used. So hopefully he will shed some light on the subject for you.

Cheers Trevor.
AnswerID: 174573

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