Doldy
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Registered: 13th Mar 08
Location: Norwich
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Ok i have done loads of fab work (see my project thread) and the cage bar and rear floor sheet steel and various other bits have gone rusty, worse in some places but only surface rust.
Basically, i want to stop the surface rust coming up, but it needs to be friendly for when its re-sprayed professionally.
What can i put on it / paint it with to stop the rust coming through again and stop any risk of rust coming through the paint after its been professionaly re-sprayed?
Thanks, Dan
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fazza
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Registered: 7th Feb 08
Location: Plymouth
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zinc primer mate
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fazza
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Registered: 7th Feb 08
Location: Plymouth
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will be in a tin or spray can like this mate
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dean101287
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Registered: 22nd Jul 07
Location: Cardiff
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Just sand it away back to the metal then spray on zinc primer as fazza said
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Firestate88
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Registered: 10th Jul 08
Location: Northampton England
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nah theres some other stuff we use at our bodyshop
you dilute it with water and brush it on
its some sort of acid but i cant for the life of me think what the name is
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Doldy
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Registered: 13th Mar 08
Location: Norwich
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Ok thanks people! Firestate88 rack your brains mate that sounds the sort of stuff i need! 
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AndyCorsaSport
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Registered: 12th Feb 06
Location: Horsforth, West Yorkshire
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Zinc primer would be better mate.
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fazza
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Registered: 7th Feb 08
Location: Plymouth
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its an anti rust primer doldy
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Doldy
Member
Registered: 13th Mar 08
Location: Norwich
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Right so that zinc 182 you can mix with thinners and spray on as a primer? I just want something that i can apply before it goes for professional prime and colour as i want 2pak primer and paint.
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fazza
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Registered: 7th Feb 08
Location: Plymouth
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unsure mate.
i got mine in a large spray can and just sprayed it all over where needed before it went to bodyshop
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Doldy
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Registered: 13th Mar 08
Location: Norwich
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Ah right cool. Did you actually use the davids branded zinc 182? I think in a spray can will be my answer tbh!
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ed
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Registered: 10th Sep 03
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If you cover it in zinc primer then the bodyshops going to want to get it all off before painting it which will cost you. Better off putting on a bit of etch primer which the bodyshop will be putting on anyway which will save them a job.
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AndyCorsaSport
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Registered: 12th Feb 06
Location: Horsforth, West Yorkshire
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The zinc primer isnt good for spraying over really, but can easily be washed off with thinners before its profesionally painted. We use the zinc primer on the inside flanges of panels for when they are spot welded on, i.e a new quarter panel, spray it on the inside of the new panel, and the outside of the inner quarter.
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Doldy
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Registered: 13th Mar 08
Location: Norwich
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Lol that leaves me back with no answer lol. If i just use normal grey primer in a rattle can, will the rust not come through again (even if i clean it all off before applying the primer?)
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ed
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Registered: 10th Sep 03
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Normal grey primer isn't etch primer though...
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AndyCorsaSport
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Registered: 12th Feb 06
Location: Horsforth, West Yorkshire
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Didnt think of etch primer, that will be spot on.
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fazza
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Registered: 7th Feb 08
Location: Plymouth
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tbh though even if that zinc primer needs taking back again 1st so will the etch primer you put on.
not being harsh but your taking it to a bodyshop to be painted and would be fucked off if the job was shit, they would take back any bits i had primered and redo them to there standards so they know no rust will be coming back through
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Firestate88
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Registered: 10th Jul 08
Location: Northampton England
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been racking my brains and i think its phosphoric acid you need to protect it
dilute it with water (how much you dilute it is up to you depending on how bad rust is and how much you want to treat it, i used 10 - 1 to keep in warranty regulations at work) and then just brush it over the metal you want to protect, the water will evaporate leaving a transparent creamy colour with a slight rainbow effect
leave to dry for couple hours then its ready to prime (or etch and prime depending on primer used)
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bieransri
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Registered: 13th Apr 06
Location: Kidsgrove, Staffordshire
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Etch primer as said. can get it in aerosol tins at motor factors. tis your best bet
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Firestate88
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Registered: 10th Jul 08
Location: Northampton England
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etch primer doesnt prevent rust from reoccuring, just sprays on metal to provide a good key for adhesion for priming
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Doldy
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Registered: 13th Mar 08
Location: Norwich
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The problem i face is this:
But do i clear all rust and use rust preventor before sending for re-spray or do i just leave it and let them sort it out?
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philip2
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Registered: 1st Oct 06
Location: n.wales/chester
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let them sort it, they would/should etch prime it then 2k primer then colour.
if its a good body shop, let them sort it.
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birchieboy
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Registered: 18th Jan 06
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quote:
Originally posted by Firestate88
nah theres some other stuff we use at our bodyshop
you dilute it with water and brush it on
its some sort of acid but i cant for the life of me think what the name is
jenolite???
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karisma_corsa
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Registered: 19th Nov 06
Location: sleaford, lincs
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what is the underside of the panel like? will that be rusty too, cos if thats out of reach and is rusty then wont you be pretty fooked?
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Doldy
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Registered: 13th Mar 08
Location: Norwich
User status: Offline
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Underside of the rear floor has all been hammerited, the rear floor was cut out, the sheet hasnt just been laid over the original floor  !
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