Oh dear. My old friend rust.

All the bits that rust!

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Postby Doive » 28 Jan 2005, 21:21

Hey Alistair, those holes look somewhat familiar....

Anyway, been thinking what you are saying about underseal, and it makes a great deal of sense. I was planning to take a weekend out when the weather warms up again to strip back and underseal the whole car, but from what you are saying I may think twice about it! A couple of coats of red oxide then more painrt sounds like a good way to go.

You say you are stripping old underseal off the car - any particular method such as heatgun and scraper? I only have an open air parking space with no access to leccytricity, so its a bit difficult for me to do. Also when it comes to painting, what kind of household paint do you intend to use? I'm assuming its not Dulux onecoat or something like that?! Personally I would tend towards something like Hammerite Stoneguard or whatever its called, you know the one I'm sure. Desperately trying to find ways of stopping the car dissolving around me!
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Postby shuvit-tim » 29 Jan 2005, 01:24

i swear buy the good old LEAD BASED brush on primers. Problem is you cant buy them in this country too easily now due to tight regulations (due to lead paint tasting like sugar and all the kiddies eating it :wink: ) When i took the rust off of my rear arches on the nova I used kurust then zinc primer then topcoat. The rust came back through the paint within about a fortnight, even though i thought i'd got rid of it all. So i repeated the job but wth some lead based primer i found from my dad's shed. It's kept it at bay happily, even 6 months in aberystwyth by the sea hasnt scared it. It's reassuringly thick too lol.
when all else fails, rivets, cable ties and bodge tape will see you through

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Postby alistair » 30 Jan 2005, 11:20

Frost and Eastwoods sell a really good brush on paint reffered to as a "harsh environment self priming rust encapsulating paint" its the same stuff used on oil rigs and the Forth Road Bridge etc. Its like painting with treacle. I have used it on a number of high danger rust areas and it seels to work very well. It can be thinned and sprayed as well.

Frost also sell POR-15 which is a superb range of rust killers, primers and tough finish paints.

And smooth gloss finish paint with decent chip resistance is good for under a car. You can buy Floor Paint (Synthetic Enamel) from a lot of paint factors which is designed to be sprayed on but don't thin it and it brushes on great. Hammerite can be a problem if when it dries and does its "hammer finish" effect it can create pinholes which let moisture in. I've not had great results with Hamerite. The smooth stuff should be better but synthetic Enamel floor paint is far cheaper so I never tried Smooth Hammerite.

I'm de-undersealing with a scraper and blow torch. I have an electric heat gun somewhere and I'm sure it would be much safer but... Some of the thinner less goopy stuff I've shifted with a wire brush cup in an angle grinder. The last residue should wipe off with celulose thinners on a rag.

I also had a vinyl roof to deal with. I hate them too. Same deal as underseal, traps moisture on metal. Leaves the roof all pitted...

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Postby Doive » 31 Jan 2005, 02:06

Thanks for all of that, I'm sure I will be merrily working away under the car come springtime. What I need is either a good pillar lift(!), or to roll the car over on its roof. Be so much easier to strip and underseal then!

I'm sure I could source some lead based primer from somewhere, my dad knows lots of old mechanics and I have connections to various boating people, and perhaps tenuous ones to the north sea oil rigs. I'm sure I'll come up with something.
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Postby Shellysowner » 07 Feb 2005, 12:23

Can I just say a massive thankyou to tim, neil and doive and anyone else who gave me info regarding holes behing batteries, water bottles etc. Had some of the insulation off the firewall and the carpet up at the weeked. There were a few small spots of rust (the insulation had about a pint of water trapped under it and all this mouldy stuff!) on the firewall which I rubbed down and rustproofed. That could've been a massive job in a couple of years so I owe you all a pint! Under the carpet - 1 sodden piece of isulation but only mild surface rust that I again rubbed down and cured. The floor has a piece of rubber (which I assume is stock) practically welded to it and try as I might I couldn't lift it without scraping it off so I thought sod it - water can't get under there if I can't and I've got a screwdriver! Don't know whether that was a stupid assumptionbut hey there wasn't really any time to do much about it anyways. The leak was indeed the screen rubber (bottom n/s corner) which I just shoved a bit of bathroom sealant in until I can afford a new screen (the lamination is starting to give on mine). Also had the car jacked up so I could fix the exhaust and while I was under there I carefull went round and cheched everything over - still mint, just a very small amount of corrosion that I quickly dealt with. The only bad thing that happened all weekend car-wise (apart from me having to try and fix my mates early micra at midnight and then 10am on sunday morning - the inline resistor in the iginition circuit had corrosion on the contacts) was that when heatgunning the footwell dry I managed to put the gun down on, and consqequently put a scorch mark in, my mint passenger seat. That was just sickening, makes me feel horrid every time I look at it :cry:
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Postby Doive » 07 Feb 2005, 12:29

Its always worth checking these things out, even if you think your car is a minter! I thought mine had been rustproofed from new, so there was no chance it would rust....... :shock:
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Postby shuvit-tim » 07 Feb 2005, 13:45

sounds like you saved yourself a lot of moneys worth of grinding and welding in 12 months time mate! nice one! gutted about the seat mate
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