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Rust stains

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  1. #1
    Apprentice (new member)
    Join Date
    Jun 2010

    Default Rust stains

    Hi All,

    Apologies in advance if this has been raised in this forum or if I have submitted to the wrong forum. I was hoping I could get some advice on how to attack a problem I am having. Our family have just moved into our house during the last year & I have have noticed rust bleed starting to appear from what appears the galvanized beading used for the render.

    The house is close to the water in the St George area in Sydney. It is not excessive yet but I want to do the job properly and not have it show through again. I have attached two photos displaying the issue and wanted to know what my options were.

    Thanks in advance for any advice.
    Attached Thumbnails Attached Thumbnails rust-stain-2.jpg   rust-stain-1.jpg  

  2. #2
    3K Club Member
    Join Date
    Jun 2010


    Short term, almost any stainless steel cleaning liquid will remove the marks.

    Long term, strip the offending corner/s and replace the steel guids with the newer PVC ones.

    Good luck.
    Growing old is compulsory, growing up is not.

  3. #3
    Old Chippy 6K
    Join Date
    Mar 2007


    Get some rust neutraliser and primer treatment - packs at paint and HW stores. Treat then coat with primer then good undercoat then two top coats. Once treated and before priming might need to fill with exterior filler.
    Advice from me on this forum is general and for guidance based on information given by the member posing the question. Not to be used in place of professional advice from people appropriately qualified in the relevant field. All structural work must be approved and constructed to the BCA or other relevant standards by suitably licensed persons. The person doing the work and reading my advice accepts responsibility for ensuring the work done accords with the applicable law.

  4. #4
    Novice mainly-outside's Avatar
    Join Date
    Aug 2012
    Sunshine Coast SEQ


    I have repaired so many of these, I am guessing it is either Rockcote render or a product toll manufactured by them.
    You need to get an enamel stain blocker and then just repaint it with the manufacturers specified paint, it is it rockcote just rockcote armour.

    It is organic material that has been picked up in the pit at the sand mine where they extract the raw materials. Everytime the Rockote lab man came out to asses the warranty claim they always dug coffee rock or remnants of an old bush fire, both are difficult to wash out and do not get picked up in the magnet.

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