cjhillman
Posted a lot
1979 Capri (Rolling Project) 1985 Escort mk3 (Daily)
Posts: 1,580
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Feb 14, 2021 16:52:09 GMT
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Whats a good off the shelf Rust converter I can use on the floor of my Car?
I have some of the Hematite Krust stuff but I'm wondering if there is something better like "Red Oxide Metal Primer" or something I can paint/spray on before I put the Carpet back in over the next two days? (https://www.screwfix.com/p/no-nonsense-red-oxide-metal-primer-undercoat-750ml/947fg)
This isnt a permeant solution just to slow stuff down till the warmer weather and I'll deal with it then.
Cheers!
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Feb 14, 2021 17:32:47 GMT
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I'd use the kurust (there are better converters but for a few months it will hold things at bay) then when that has dried paint it with something waterproof something like hammerite or bonda primer should be available localy and will do for a while.
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Feb 14, 2021 18:16:03 GMT
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I used THIS on the underside of my transit after welding in new arches and floor panels, it was fine 12 months later for the next MOT.
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Feb 14, 2021 18:42:14 GMT
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I've been using Bilt-Hamber "Hydrate 80" recently, which I've read good things about.
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jgtr
Part of things
Posts: 270
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Feb 14, 2021 18:53:44 GMT
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If you’re going to deal with it later just a good clean up and paint with a direct to metal anti corrosion primer.
I’ve used Bilt Hamber Hydrate 80, seems a bit hit and miss as some bits worked well and some came back within 6 months. If you do use Hydrate 80 follow the instructions to the letter and get as much rust off as possible
I’ve used their Deox Gel which worked really well, great for hard to reach areas or panels that are hard to replace - it saved me having to replace my front screen aperture. Downside is that it takes time, 7 applications all told - but for £15 a tub it saved me £1.5k of welding.
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Last Edit: Feb 14, 2021 18:57:06 GMT by jgtr
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shin2chin
Part of things
Making curse word cars slightly better
Posts: 820
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Feb 14, 2021 19:01:26 GMT
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Vactan is the stuff I use. Available from Ebay.
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1977 PORSCHE 2.0na 924 1974 VW Beetle 1600
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Feb 14, 2021 19:47:54 GMT
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After previous discussions on here where various individuals pointed out the main ingredient of all these rust converters is Phosphoric Acid. I now just get myself a 5l bottle off amazon. That should last you a while. Although do read the warnings about not getting it on yourself.
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Feb 14, 2021 20:51:31 GMT
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Most of the ones like hydrate 80 contain some sort of resin as well as the phosphoric acid, they claim this bonds securely to the rust and encapsulates it, if you use straight phosphoric acid it needs to be washed off with distilled water and coated with something to seal it, this process can give better results as with repeated applications of the acid you should be able to actually get rid of the rust rather than entomb it.
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Last Edit: Feb 15, 2021 10:00:37 GMT by kevins
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I'm one of those that uses 30 percent phosphoric acid. It does indeed remove all rust if used correctly.
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Proton Jumbuck-deceased :-( 2005 Kia Sorento the parts hauling heap V8 Humber Hawk 1948 Standard12 pickup 1953 Pop build (wifey's BIVA build).
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1967 Triumph Vitesse convertible (old friend) 1996 Audi A6 2.5 TDI Avant (still durability testing) 1972 GT6 Mk3 (Restored after loong rest & getting the hang of being a car again)
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Yeah just buy straight phosphoric acid. It's used quite a lot in agriculture so it's readily available in large quantities.
It does need to be washed off, and will have a light protective layer but won't stand up to moisture for long (if it's sitting in a garage you shouldn't get flash rust, but outside it will still go rusty).
Careful when spraying it as it does drip and mist a bit and it's nasty stuff to get in your eye (the concentrated stuff at least).
You can also stick some in a pot and just leave rusty hardware in it and it'll come out shiny. Can use it quite a few times that way before it's all used up, no need to chuck it after the first batch.
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jgtr
Part of things
Posts: 270
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Feb 15, 2021 10:15:29 GMT
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I prefer the Gels, they stick to panel, don’t drip and you can build up a nice thickness, cover with clingfilm to stop them drying out. Brush on, leave, wire brush, wash off👍
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