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Old 17 May 2012, 20:39   #11
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Oxalic Acid

It isgreat stuff!

We used to use it on ships to remove brown rust stains from white paintwork, and it works very well, however it does discolour green paint if you leave it on there, it sort of fades it, same for red. I would suggest trying it on a very small descrete area before "splashing it on all over"!

However for gelcoat I am sure it would be fine.

A word of warning, also keep it away from any natural fibres, such as hemp/manilla ropes, or normal canvas, as it will rot them very easily. This was the reason we were banned from using it on ships. Since then we have tried dozens of different things, but nothing as good as Oxalic acid.

Gary
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Old 18 May 2012, 11:57   #12
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I used cillit bang and a pan brush. That is kitchen pan not toilet pan!!!!
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Old 18 May 2012, 13:01   #13
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Originally Posted by willk View Post
I thought that you'd need a nuclear tactical battlefield weapon to get rid of Staines?

It's quite the blot...
I had that thought too ,... only I was looking at my driveway, and thinking.... I much prefer monoblock
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Old 19 May 2012, 05:07   #14
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Mix it up thick with WPP powder, apply with a brush or roller - it clings to your work and washes off with a hose. It doesn't store well - I guess the acid works on the paste too. I use it quite a lot, on gel coat, flow coat and tiles. It works a treat. You can use it on stainless steel too.

All the usual precautions apply as regards personal protection. You might want to keep it away from galvanised steel (hint: trailer) - it comes up very clean but much thinner!!

Start with 10% Acid to 90% water/paste
Or you could try using rhubarb leaves
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Old 20 May 2012, 11:13   #15
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I thought that you'd need a nuclear tactical battlefield weapon to get rid of Staines?

It's quite the blot...
Staines on Thames - Is it cos i iz, like, takin' da p1ss?
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Old 20 May 2012, 11:18   #16
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Staines on Thames - Is it cos i iz, like, takin' da p1ss?
It's good for getting rid of stains too
And yes getting rid of Staines will be harder!
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Old 20 May 2012, 15:39   #17
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you cant clean it have be sanded off now
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