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  1. #1
    Join Date
    May 2001
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    finder
    Posts
    492

    Talking So what standard household cleaners contain enough oxalic acid

    .................to get rid of brown stains and rust from the topsides? My boat is in an area with (occasionally) high levels of pollution. as a result I need to clean her up pretty frequently so it's expensive to use Y10 - which IS a good product.
    The answer is to use a cheap household cleaner but the labels on the few I looked at were silent on oxalic acid content.
    Ideally I want to buy enough to put me in a frame of mind to clean her regularly.
    Can you help? (Not with the cleaning .................unless you really want to!!)
    Brendan

  2. #2
    Join Date
    Sep 2006
    Location
    Gran Canaria
    Posts
    1,945

  3. #3
    Join Date
    Jul 2009
    Posts
    19,519

    Default

    Some people mix up their own version of Y10 using oxalic acid and wallpaper paste. I considered doing so but then I decided it wasn't worth the trouble because a pot of Y10 lasts me two years so that's only about 6/year.

    Tip: choose a warm day to apply it (yes I know!).

  4. #4
    Join Date
    Oct 2004
    Location
    S. Hampshire
    Posts
    1,841

    Default

    If you want to remove brown stains=rust, you can also use citric acid froma chemist or wine making shop. Its cheap, not poisonous like oxalic acid, and you can in emergency put it in your G&T in place of lemon !
    Def: Yachting - a way of spending the kids inheritance

  5. #5
    Join Date
    Mar 2011
    Posts
    49

    Default

    buying the oxalic in bulk and mixing your own is far cheaper than trying to find a cheap alternative in the supermarket. Its not anywhere near as hazardous as is often implied on here, as long as basic precautions are taken. I got an eyefull over the winter that did smart a bit, so I've taken to wearing glasses when I use it now.

  6. #6
    Join Date
    Jul 2002
    Location
    Home: Kent. Boat: Chichester
    Posts
    42,706

    Default

    Quote Originally Posted by brendanbergin View Post
    .................to get rid of brown stains and rust from the topsides? My boat is in an area with (occasionally) high levels of pollution. as a result I need to clean her up pretty frequently so it's expensive to use Y10 - which IS a good product.
    The answer is to use a cheap household cleaner but the labels on the few I looked at were silent on oxalic acid content.
    Ideally I want to buy enough to put me in a frame of mind to clean her regularly.
    Can you help? (Not with the cleaning .................unless you really want to!!)
    I am not aware of any household cleaners that contain oxalic acid. It doesn't mean there aren't any but if there are I have not come across them.

    As suggested buy some oxalic acid and use it as a near saturated solution, thickened with wallpaper paste for vertical surfaces.
    Take the usual precautions you would with any other corrosive and mildly toxic substance. Goggles or safety specs and impervious gloves. Wash any splashes off the skin promptly.

    For many uses Cillit Bang Grime and Lime may be effective but according to another forum thread its formulation has been changed and it is no longer effective on rust stains.
    Last edited by VicS; 05-05-12 at 13:31.

  7. #7
    Join Date
    Jan 2011
    Location
    Troon
    Posts
    536

    Default

    BKF (AKA Bar Keepers Friend) is readily available in most supermarkets-certainly in Waitrose, and ironmongers and other DIY type places. 3 a container, is dry powder, goes a very long way. Oxalic acid is the third ingrediant listed, but no %age given. I've been using it for years on the hull-works a treat.

    HTH

  8. #8
    Join Date
    May 2005
    Location
    up on the moors.
    Posts
    33,000

    Default

    between 5 and 10%.

    There are a number of BKF products in the range, so the % may vary.
    Last edited by sarabande; 21-06-12 at 09:22.
    I think, therefore I am. I am, therefore I sail.

  9. #9
    Join Date
    Jul 2002
    Location
    Home: Kent. Boat: Chichester
    Posts
    42,706

    Default

    Quote Originally Posted by sarabande View Post
    between 5 and 10%.

    There are a number of BKF products in the range, so the % may vary.
    It does and not all contain oxalic acid.

  10. #10
    Join Date
    May 2001
    Location
    live near Saint Ives, Cornwall.
    Posts
    3,850

    Default

    Quote Originally Posted by brendanbergin View Post
    .................to get rid of brown stains and rust from the topsides? My boat is in an area with (occasionally) high levels of pollution. as a result I need to clean her up pretty frequently so it's expensive to use Y10 - which IS a good product.
    The answer is to use a cheap household cleaner but the labels on the few I looked at were silent on oxalic acid content.
    Ideally I want to buy enough to put me in a frame of mind to clean her regularly.
    Can you help? (Not with the cleaning .................unless you really want to!!)
    A few years ago, while in Australia, I bought some GRP Gel-coat Cleaner in gel form - it had KH on the label - and it consisted of 10% hydrochloric acid.

    Having run out, I found that B&Q Patio Cleaner was 8% hydrochloric acid in water.

    I fill a spray can with the Patio Cleaner and about 5% citrus type cleaner and spray it on the brown and rust stains. The stains come off easily with just a wipe. I then wash down with fresh water.

    My boat polish comes from the same source - B&Q!
    regards,
    Philip

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