Any recomendations years ago I used "jenolite" is there any better stuff available
Ta in advance
The other option is zinc-loaded stuff like Galvafroid, but the idea (iirc) is to use it on metal that has been cleaned - ie remove as much rust as possible - but *hasn't* been treated with phosphoric acid-type stuff (ie Kurust, Jenolite, etc). BTW - comparing the weight of a tin of Galvafroid with some of the other 'zinc-based' primers, it's a *lot* heavier, hopefully there's a lot of zinc in it 😉
There's some other stuff like Galvafroid, called Zinga :
http://www.marineresourcecentre.co.uk/company_zinga.html
I'd be inclined to use one of those two, the fact that they're used on external/marine structures is kida telling. Galvafroid's what I've used on the window frames in our 20's house - I'll tell you in 10 years how it's worked 😉 It's also the same stuff my (notional) father-in-law used on their house 30 or 40 years ago, and reckoned it worked well.
Getting as much rust off as possible is still a big part of a decent result tho' - I've noticed with the phosphoric acid treatments that they're just turn surface rust black, but scratch it and the stuff underneath's still red. If you *can* grit/sand(etc) blast it, you'll get a longer-lasting result.
Bilt Hamber [url= http://www.bilthamber.com/corrosionremoval.html ]Deox[/url] gel, it's awesome stuff, you just bog it on with a brush, cover it with a bit of plastic bag so it doesn't dry out and leave it for a day, give a quick scrub with a wire brush then wipe off with a damp cloth.
Sometimes deeper bits neet re-treating but it leaves shiny clean metal, or sometimes holes lol.
It looks like apple sauce when you start but after a few hours it turns into black sludge, amazing stuff!
The scuttle was very rusty, you can see the lip is perforated in places.
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Rusty battery tray.
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The apple sauce in action.
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Gone.
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Don't even consider anything else.
Err...crikey, that looks pretty good - has sorted out all the fine pits ?