Alternative to Hammerite ??

Discussion in 'UK DIY' started by Bill, Oct 23, 2009.

  1. Bill

    Bill Guest

    Hi all,
    I have 40m square of steel sheeting to paint, mostly still covered with
    its original paint but also with a fair amount of rust caused by scrapes
    and scratches, Obviously the ideal answer would be to sand it down,
    prime and paint but to be honest the finish does not need to be perfect
    so I am looking for a quick fix. Is there anything that could be
    painted on either as a primer or final coat that is not going to mind
    going on top of rust? All thoughts gratefully received, thank you.
    --
    Bill
    Bill, Oct 23, 2009
    #1
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  2. Bill

    Adrian Guest

    Bill <> gurgled happily, sounding much like they
    were saying:

    > Hi all,
    > I have 40m square of steel sheeting to paint, mostly still covered with
    > its original paint but also with a fair amount of rust caused by scrapes
    > and scratches, Obviously the ideal answer would be to sand it down,
    > prime and paint but to be honest the finish does not need to be perfect
    > so I am looking for a quick fix. Is there anything that could be
    > painted on either as a primer or final coat that is not going to mind
    > going on top of rust? All thoughts gratefully received, thank you.


    Whatever you use, you need to clean it up. The only question is how
    thoroughly - and that depends on how badly you want to keep it.

    I've just asked an online supplier a similar question regarding car
    undercarriage. Their answer was to clean it back "manually" (ie wirebrush
    etc sufficiently to clean all the flakiness and loose muck off, but don't
    worry about getting it all spanglingly shiny) and use Rustoleum 769. A
    chunk of change from £20/litre, mixed to whatever colour.
    Adrian, Oct 23, 2009
    #2
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  3. Bill

    Bruce Guest

    On Fri, 23 Oct 2009 02:27:20 +0100, Bill <>
    wrote:

    >Hi all,
    >I have 40m square of steel sheeting to paint, mostly still covered with
    >its original paint but also with a fair amount of rust caused by scrapes
    >and scratches, Obviously the ideal answer would be to sand it down,
    >prime and paint but to be honest the finish does not need to be perfect
    >so I am looking for a quick fix. Is there anything that could be
    >painted on either as a primer or final coat that is not going to mind
    >going on top of rust? All thoughts gratefully received, thank you.



    That's a very large area, so whatever treatment you choose should not
    be an expensive one.

    I would be tempted to remove any loose rust with a wire brush then use
    Kurust to stablise what rust is left behind. Then apply your chosen
    paint system, preferably finishing in a colour that won't show any
    areas of rust that break through. In other words, not white. ;-)
    Bruce, Oct 23, 2009
    #3
  4. Bill

    Bill Guest

    In message <>, Bruce
    <> writes
    >That's a very large area, so whatever treatment you choose should not
    >be an expensive one.
    >


    Indeed, a major consideration. :)


    >
    >I would be tempted to remove any loose rust with a wire brush then use
    >Kurust to stablise what rust is left behind. Then apply your chosen
    >paint system, preferably finishing in a colour that won't show any
    >areas of rust that break through. In other words, not white. ;-)


    I'm looking at Matt NATO green, should fit the situation perfectly, and
    it's relatively cheap :)

    http://www.anchorsupplies.com/paint.htm

    Thanks for the comments.

    >


    --
    Bill
    Bill, Oct 23, 2009
    #4
  5. Bill

    Bruce Guest

    On Fri, 23 Oct 2009 14:49:01 +0100, Bill <>
    wrote:
    >In message <>, Bruce
    ><> writes
    >>That's a very large area, so whatever treatment you choose should not
    >>be an expensive one.

    >
    >Indeed, a major consideration. :)
    >>
    >>I would be tempted to remove any loose rust with a wire brush then use
    >>Kurust to stablise what rust is left behind. Then apply your chosen
    >>paint system, preferably finishing in a colour that won't show any
    >>areas of rust that break through. In other words, not white. ;-)

    >
    >I'm looking at Matt NATO green, should fit the situation perfectly, and
    >it's relatively cheap :)
    >
    >http://www.anchorsupplies.com/paint.htm



    A good choice. Apply with a roller, and a brush to cut in?


    >Thanks for the comments.



    You're welcome.
    Bruce, Oct 23, 2009
    #5
  6. Bill

    js.b1 Guest

    Wire brush tend to require brute-force angle-grinder rather than drill
    - and remove a fair bit of metal too.

    3M Clean N Strip XT (purple) discs are very good.
    2-3 will strip an entire car of paint, corrosion, pitting to bare
    steel without removing much steel which might be important. Frost's
    Auto Restoration and probably fleabay do them.

    Hammerite is good until water gets under it.
    Protection is how much are you willing to pay.
    True cold galvanising paint like Galvafroid works surprisingly well -
    you need to get to Sa2.5 (good 3M clean n strip, no dark mill-scale,
    not likely if corroded steel). It does require a primer on top &
    suitable paint since it is mechanically very weak - it is pure
    virtually nanoscopic zinc (and ridiculously heavy and priced
    accordingly).
    Zinc loaded epoxy works well, 2pk is available; commonly used in
    marine applications with micaceous oxide and so on.
    POR15 is good if you never intend to weld.

    If this is a long boat, hire a media blaster - or perhaps see if you
    can get an attachment for a pressure washer, in theory they should
    exist but I have never bothered. That keeps the material wet which
    reduces the mess.

    The 3M clean-n-strip in Purple XT form are like a sand blaster in
    their speed - very effective removal of everything except the steel.
    Best product for auto or similar "thin sheet metal" repairs ever.
    Galvafroid is pig ugly for auto use because it is thick and requires a
    suitable galvanised-metal primer because conventional car paint has no
    chance of sticking on top.otherwise.

    Another alternative would be a metal-prep with suitable primer & paint
    on top. Comes down to the application. The zinc-epoxy can be roller
    applied and will at least give a good life. I assume the 40sq-m it
    can't be dipped?
    js.b1, Oct 23, 2009
    #6
  7. We were somewhere around Barstow, on the edge of the desert, when the
    drugs began to take hold. I remember Bill <>
    saying something like:

    >I'm looking at Matt NATO green, should fit the situation perfectly, and
    >it's relatively cheap :)
    >
    >http://www.anchorsupplies.com/paint.htm
    >
    >Thanks for the comments.


    Use dilute phosphoric acid, which is all Kurust is, to treat the rusty
    areas with, first.
    Grimly Curmudgeon, Oct 24, 2009
    #7
  8. We were somewhere around Barstow, on the edge of the desert, when the
    drugs began to take hold. I remember "js.b1" <> saying
    something like:

    >If this is a long boat,


    Images of Kirk Douglas in 'The Long Ships', and that bloody horn racket.

    Itym narrow boat?
    Grimly Curmudgeon, Oct 24, 2009
    #8
  9. Bill

    Stuart Noble Guest

    Grimly Curmudgeon wrote:
    > We were somewhere around Barstow, on the edge of the desert, when the
    > drugs began to take hold. I remember Bill <>
    > saying something like:
    >
    >> I'm looking at Matt NATO green, should fit the situation perfectly, and
    >> it's relatively cheap :)
    >>
    >> http://www.anchorsupplies.com/paint.htm
    >>
    >> Thanks for the comments.

    >
    > Use dilute phosphoric acid, which is all Kurust is, to treat the rusty
    > areas with, first.


    Not exactly off the shelf though
    Stuart Noble, Oct 24, 2009
    #9
  10. Bill

    Bill Guest

    In message <>, Grimly
    Curmudgeon <> writes
    >We were somewhere around Barstow, on the edge of the desert, when the
    >drugs began to take hold. I remember Bill <>
    >saying something like:
    >
    >>I'm looking at Matt NATO green, should fit the situation perfectly, and
    >>it's relatively cheap :)
    >>
    >>http://www.anchorsupplies.com/paint.htm
    >>
    >>Thanks for the comments.

    >
    >Use dilute phosphoric acid, which is all Kurust is, to treat the rusty
    >areas with, first.


    As found in Coca Cola apparently!

    But apart from that a quick Google has not thrown up any easy suppliers
    of it. What sort of figure were you thinking of by saying "dilute"?
    Also any suggest sources? There is 85% 125ml available on Ebay but
    this is way outside my comfort zone. Where as Kurust maybe out side my
    finances for the amount required!

    As to the question is it a narrow boat? Unfortunately not, it is a metal
    shipping container, a rather rust one :)

    --
    Bill
    Bill, Oct 24, 2009
    #10
  11. Bill

    geoff Guest

    In message <>, Bill
    <> writes
    >In message <>, Grimly
    >Curmudgeon <> writes
    >>We were somewhere around Barstow, on the edge of the desert, when the
    >>drugs began to take hold. I remember Bill <>
    >>saying something like:
    >>
    >>>I'm looking at Matt NATO green, should fit the situation perfectly, and
    >>>it's relatively cheap :)
    >>>
    >>>http://www.anchorsupplies.com/paint.htm
    >>>
    >>>Thanks for the comments.

    >>
    >>Use dilute phosphoric acid, which is all Kurust is, to treat the rusty
    >>areas with, first.

    >
    >As found in Coca Cola apparently!
    >
    >But apart from that a quick Google has not thrown up any easy suppliers
    >of it. What sort of figure were you thinking of by saying "dilute"?
    >Also any suggest sources? There is 85% 125ml available on Ebay but
    >this is way outside my comfort zone. Where as Kurust maybe out side my
    >finances for the amount required!
    >
    >As to the question is it a narrow boat? Unfortunately not, it is a
    >metal shipping container, a rather rust one :)
    >


    There you go ...

    http://www.kamco.co.uk/FX.htm


    --
    geoff
    geoff, Oct 24, 2009
    #11
  12. On Sat, 24 Oct 2009 12:55:32 +0100, Bill wrote:

    >> Use dilute phosphoric acid, which is all Kurust is, to treat the

    rusty
    >> areas with, first.

    >
    > There is 85% 125ml available on Ebay but this is way outside my comfort
    > zone. Where as Kurust maybe out side my finances for the amount
    > required!


    Today bought some HG "Cement grout film remover" 1l for £8.43 this
    according to the Safety Data Sheet is 15 - 30% Phosphoric Acid. For
    it's intended use you dilute 10:1 with water.

    http://www.homecareessentials.co.uk/acatalog/Cement_.html

    --
    Cheers
    Dave.
    Dave Liquorice, Oct 27, 2009
    #12
  13. Bill

    JimK Guest

    On Oct 24, 11:44 am, Stuart Noble <> wrote:
    > Grimly Curmudgeon wrote:
    > > We were somewhere around Barstow, on the edge of the desert, when the
    > > drugs began to take hold. I remember Bill <>
    > > saying something like:

    >
    > >> I'm looking at Matt NATO green, should fit the situation perfectly, and
    > >> it's relatively cheap :)

    >
    > >>http://www.anchorsupplies.com/paint.htm

    >
    > >> Thanks for the comments.

    >
    > > Use dilute phosphoric acid, which is all Kurust is, to treat the rusty
    > > areas with, first.

    >
    > Not exactly off the shelf though


    acid based alloy car wheel cleaner?

    JimK
    JimK, Oct 27, 2009
    #13
  14. We were somewhere around Barstow, on the edge of the desert, when the
    drugs began to take hold. I remember Stuart Noble
    <> saying something like:

    >> Use dilute phosphoric acid, which is all Kurust is, to treat the rusty
    >> areas with, first.

    >
    >Not exactly off the shelf though


    Milk parlour descaler, available by the gallon, is 30% phosphoric acid,
    afair.
    Grimly Curmudgeon, Nov 3, 2009
    #14
  15. We were somewhere around Barstow, on the edge of the desert, when the
    drugs began to take hold. I remember geoff <> saying
    something like:

    >>As to the question is it a narrow boat? Unfortunately not, it is a
    >>metal shipping container, a rather rust one :)
    >>

    >
    >There you go ...
    >
    >http://www.kamco.co.uk/FX.htm


    And further to my earlier reply;
    http://www.kamco.co.uk/MSDS/PDF/FX.pdf
    Grimly Curmudgeon, Nov 3, 2009
    #15
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