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  1. #1
    Join Date
    Feb 2013
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    Bournemouth
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    782

    Default Which household products contain enough oxalic acid?

    I want to clean some rust stains off the GRP this weekend.. It's too late to order oxalic acid online and be sure to get it by Friday afternoon so I need to get something from the high street..

    The usual selection of shops around eg. Sainsburys, Tesco, Wickes, Halfords etc..

    I have looked at the Harpic toilet cleaner with lime scale remover and it contains Hydrochloric acid.. Other cleaners in the house I have looked at have citric acid but nothing so far with oxalic acid..

    Which household products available in these stores would have a high enough concentration of oxalic acid to do the job??

    Thanks..

  2. #2
    Join Date
    May 2003
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    Here or there
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    65,663

    Default

    Quote Originally Posted by wipe_out View Post
    I want to clean some rust stains off the GRP this weekend.. It's too late to order oxalic acid online and be sure to get it by Friday afternoon so I need to get something from the high street..

    The usual selection of shops around eg. Sainsburys, Tesco, Wickes, Halfords etc..

    I have looked at the Harpic toilet cleaner with lime scale remover and it contains Hydrochloric acid.. Other cleaners in the house I have looked at have citric acid but nothing so far with oxalic acid..

    Which household products available in these stores would have a high enough concentration of oxalic acid to do the job??

    Thanks..
    how about oxalic acid from a chemist
    or boil up some rhubarb leaves
    The faultfinder will find faults even in paradise.

  3. #3
    Join Date
    Oct 2004
    Location
    I know how fast I'm going, but not where I am
    Posts
    5,569

    Default

    Or Y10 from a chandlers if you can get to one.
    Andersen 22. The best winch never made.

  4. #4
    Join Date
    Feb 2010
    Posts
    13,049

    Default

    Quote Originally Posted by sailorman View Post
    how about oxalic acid from a chemist
    +1 Any chemist can order it in (usually next day) but not all are willing to do so. I've had more luck with independents who don't seem to be tied down with Head Office rules.

  5. #5
    Join Date
    Jul 2002
    Location
    Home: Kent. Boat: Chichester
    Posts
    33,846

    Default

    Quote Originally Posted by wipe_out View Post
    I want to clean some rust stains off the GRP this weekend.. It's too late to order oxalic acid online and be sure to get it by Friday afternoon so I need to get something from the high street..

    The usual selection of shops around eg. Sainsburys, Tesco, Wickes, Halfords etc..

    I have looked at the Harpic toilet cleaner with lime scale remover and it contains Hydrochloric acid.. Other cleaners in the house I have looked at have citric acid but nothing so far with oxalic acid..

    Which household products available in these stores would have a high enough concentration of oxalic acid to do the job??

    Thanks..
    I am not aware of any household products which contain oxalic acid. Far too dangerous. iirc Seajet got a splash or two on himself and it nearly killed him!

    The Harpic limescale remover contains HCl as you have discovered.

    Cillit Bang Lime and Grime contains sulphamic acid. Just this week used that to effectively clean some heavy rust staining and deposits from a length of rope.

    Citric acid will do it but less effectively than oxalic.
    Last edited by VicS; 03-07-13 at 20:22.
    Sea Wych Owners Association: www.Seawych.org

  6. #6
    Join Date
    Sep 2003
    Location
    Cambridgeshire
    Posts
    1,060

    Default

    Bar Keepers Friend is available from some of the bigger Asda's. Not sure about other supermarkets.

  7. #7
    Join Date
    Feb 2013
    Location
    Bournemouth
    Posts
    782

    Default

    Thanks for the chemist suggestion.. Don't know why I didn't think to try that.. I think there is an independent one that may get it for me.. Failing that I might need to make a detour to ASDA on the way to the boat..

  8. #8
    Join Date
    Feb 2005
    Location
    Near Here
    Posts
    34,932

    Default

    I had no luck whatsoever with chemists, chain or independent.Most had no idea what I was talking about.
    Get Astonish cream oven cleaner. Safe on GRP. I cleaned up all the decks (including bad rust stains) on my motor boat with it.
    Another person's thoughts about you are outside of your jurisdiction.

  9. #9
    Join Date
    Jan 2006
    Location
    Behind your curtains.
    Posts
    6,782

    Default

    Why don't you just pop into a chandlery and buy some rust stain remover?

  10. #10

    Default

    Quote Originally Posted by VicS View Post
    I am not aware of any household products which contain oxalic acid. Far too dangerous. iirc Seajet got a splash or two on himself and it nearly killed him!

    The Harpic limescale remover contains HCl as you have discovered.

    Cillit Bang Lime and Grime contains sulphamic acid. Just this week used that to effectively clean some heavy rust staining and deposits from a length of rope.

    Citric acid will do it but less effectively than oxalic.
    Sadly, recent formulations of Cillit Bang Lime and Grime don't remove rust stains - confirmed with correspondence with Reckits.

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