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Thread: Removing powdercoat?

  1. #1
    Join Date
    Jul 2012
    Location
    Brisbane
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    1,845

    Removing powdercoat?

    Hello from Sherwood.

    Back in the New Year I had a heap of parts powdercoated, including several that hadn't been the subject of this intention. The latter were mainly the swivel hubs, steering arms, hub driven plates, steering column tube and several blanking plates off the motor and steering box. These were meant to be sandblasted and finished in enamel.

    That would have been ok, but the operative who did the coating was not the person that I was directly dealing with. He had apparently mis-understood the specific instructions on which surfaces were to be masked and which were to be painted. So, many of the mating surfaces now have a shiny and well cured covering of powdercoat which will need to be removed to get a reasonable seal at the joints.

    I believe it is possible to remove powdercoat with further sandblasting or chemical removers. But, that probably requires having the whole part stripped and repainted which I would prefer to avoid if possible. Not sure if an abrasive paper can be used to get the coating off the affected surfaces without scoring the metal face or leaving it uneven?

    Does anyone have a workable answer - or should I just bite the bullet and have the lot removed and start again?

    Cheers,

    Neil
    Hon Secretary - SLOw Inc

    1975 S3 88" - Ratel

  2. #2
    Join Date
    Apr 2014
    Location
    Blair Athol, Adelaide South Aust.
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    2,666
    Start over. Anything thats powdercoated that shouldnt be will need re doing.
    Cheers, Rod


    BETSY
    1967 Series 2a. 109 4 cyl petrol, Fairey o/drive, Athol Hedges roof.
    Currently undergoing rebuild.
    Will have-- soft top, 4 wheel disc brakes, salisbury rear diff, military colour, 12 pin nato socket, dual pintle hitch....

    1975 Series 3. 109 6cyl 186, 5 speed Nissan cabstar gearbox, mechanical winch, roo bar, kings awning, 50" light bar, roof rack, twin 6"light bars, kings awning tent.

    1969 NO. 5 trailer. ARN 176 464. soft top.

  3. #3
    Join Date
    Sep 2012
    Location
    Westlake ,brisbane
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    2,191
    Hi Neil,
    The sand blasters send them for heat treatment to burn the powder coating off before blasting these days. Not sure what the cost is though. You can grind it off but take the chance of damaging the mating surfaces .
    Wayne

  4. #4
    Join Date
    Jan 2010
    Location
    Melbourne
    Posts
    1,734
    I recently used a can of Crc gasket remover on a small part. Spray, leave for some mins, powdercoat will wipe off.

  5. #5
    Join Date
    Jul 2012
    Location
    Brisbane
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    1,845

    Care required

    Quote Originally Posted by manic View Post
    I recently used a can of Crc gasket remover on a small part. Spray, leave for some mins, powdercoat will wipe off.
    Hello and thanks.

    I had read (Google) that powdercoating could be chemically removed with paint stripper and various other solvents (presumably CRC gasket remover is one example). In all of the example cases the aim was to remove all of the coating rather than selected areas.

    I had thought to give it a go, but was a bit concerned that it might not stop dissolving the coating before it reached the edges of the bits that were to remain coated. I suppose there isn't too much to lose if the alternative is complete removal and starting again.

    Cheers,

    Neil
    Hon Secretary - SLOw Inc

    1975 S3 88" - Ratel

  6. #6
    Join Date
    Jul 2012
    Location
    Brisbane
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    Snakes and ladders.........

    Thanks Gents.

    The general consensus is consistent with my non-technical (Google) understanding of the options. I guess in posing the original question there was an element of forlorn hope in there for a slim chance of finding a narrow path to salvation - not unlike asking the question of "I wonder could it rain?" in the midst of a howling drought........

    Actually the evolving chain of circumstances unfolded not unlike the action in a Buster Keaton movie where the audience in the comfy seats eating an ice cream can clearly see what is going to happen next, whereas the poor sap on the stage is still trying to work out where the last hit came from.

    It must be advancing age, retirement, or growing familiarity with Land Rover affairs, but the process was not accompanied by much profane language or howls of rage. Rather, punctuated nods of resignation and puzzlement of what to try next. Brought to mind an old adage that I came across at some stage - 'judgement is based on experience, which is usually based on the outcomes of previous poor judgement'.

    Cheers,

    Neil
    Hon Secretary - SLOw Inc

    1975 S3 88" - Ratel

  7. #7
    DAMINK Guest
    If it was me i would just have attacked it with a flappy and hoped for the best lol.
    Seriously i would have!!

  8. #8
    Join Date
    Jul 2012
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    Brisbane
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    Thought of that........

    Quote Originally Posted by DAMINK View Post
    If it was me i would just have attacked it with a flappy and hoped for the best lol.
    Seriously i would have!!
    You have spotted one of my earlier Plan B's.............

    Cheers,
    Hon Secretary - SLOw Inc

    1975 S3 88" - Ratel

  9. #9
    Join Date
    Jul 2012
    Location
    Brisbane
    Posts
    1,845

    Whatís happening?

    Hello again from Brisbane.

    Just back from six weeks in North America and thoughts eventually returned to the task(s) at hand.

    Bit the bullet and dumped the lot back at the original powdercoaters for caustic dipping to remove the finish for starting again. This was only for the iron parts as I was told that anything made of alloy would be just a distant memory. It certainly worked.

    As it happened there was one small alloy part that I attacked with paint stripper and thinners. Took about two and a bit hours but finally came clean.

    All getting sand blasted on Monday morning ready for painting - all chalked up to experience in this case. They say if it doesnít hurt you arenít trying hard enough.

    Cheers,

    Neil

  10. #10
    Join Date
    Sep 2012
    Location
    Westlake ,brisbane
    Posts
    2,191
    Neil , When using paint striper if you paint the striper on then cover with cling wrap it works better , small items you can put in a resealable bag . I think it stops the paint striper fro drying out .
    Wayne

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