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Thread: Sand blasting aluminium.

  1. #11
    Join Date
    Dec 2008
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    Tewantin, Qld
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    My 2 cents on the topic.
    Most cleaning baths and degreasers (nonsolvent) have a fair whack of caustic soda in them, as do most paint strippers.
    The chemistry that does the cleaning, is that the caustic soda reacts with the oil and turns it into sort of a soap which dissolves in water
    Aluminium will react with caustic soda leaving you with aluminium oxide and hydrogen gas. A neat but dangerous party trick.

    I used a Karcher with a wet sand blasting attachment to prep 1.2mm panels on my boat and had no problem with warping.
    the media was fine beach sand, the largest panels was about 900 x 600.
    At about the same time a friend was restoring an old Mazda, using a compressed air sand blaster, and the same media. He ended up with a few problems with warping.
    I know that 1.2mm panels are thicker than car panels, but I really laid into my stuff, as others have said, I think it's the heat build up that makes a difference.

    Cheers Glen

  2. #12
    Join Date
    Nov 2012
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    Gawler
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    Eco clean

    I used a guy in Adelaide who uses recycled plastic granules through a water blaster. he came to my place and stripped the body panels of the 88" in my driveway for $800! No heat, no real abrasion and it just fell off.
    I can send you a video if you want to contact me
    Boxpacker

  3. #13
    Join Date
    Oct 2020
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    Elizabeth North SA
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    Quote Originally Posted by Boxpacker View Post
    I used a guy in Adelaide who uses recycled plastic granules through a water blaster. he came to my place and stripped the body panels of the 88" in my driveway for $800! No heat, no real abrasion and it just fell off.
    I can send you a video if you want to contact me
    Boxpacker
    I'd like my trailers rust cleaned up conveniently at home

    I am sure you could just post a link to the business here, as a happy customer?

  4. #14
    Join Date
    Apr 2019
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    South Australia
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    Have you got the details? I’ve another project and been looking at finding a mobile blaster?

    I’m in southern Adelaide

  5. #15
    Join Date
    Apr 2019
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    South Australia
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    Took the plunge and booked a local hydro dustless mobile blaster to come and do the van….

    Never again

    While the guy worked very hard, and it was less than half the cost of sending it away, I’ve spent day shoveling sand off the drive, cleaning cars in the street, and power washing the van multiple times to get rid of the sand. The sand is caked everywhere.

    That, plus the van flash rusted all over and so had to spray with rust remover that then had to be washed off again.

  6. #16
    Lionelgee is offline YarnMaster Silver Subscriber
    Join Date
    Mar 2010
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    Queensland
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    Quote Originally Posted by Cadas View Post
    Took the plunge and booked a local hydro dustless mobile blaster to come and do the van….

    Never again

    While the guy worked very hard, and it was less than half the cost of sending it away, I’ve spent day shoveling sand off the drive, cleaning cars in the street, and power washing the van multiple times to get rid of the sand. The sand is caked everywhere.

    That, plus the van flash rusted all over and so had to spray with rust remover that then had to be washed off again.
    Hey Cadas,

    The last time you posted about the van was back on the 1st February 2022, 07:36 PM. Any chance of an update! How did you go with narrowing down a suitable more modern engine and gearbox than one made in 1959? New post .... Thames 1959 ... Hint ... Hint

    Kind regards
    Lionel

  7. #17
    Join Date
    Apr 2019
    Location
    South Australia
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    Ah the van.

    Well, the van started and quickly became a huge challenge, not helped by the fact I was stuck working away in geelong.

    But while there in geelong, I came across a (virtually) rust free, complete and driving Thames bus which came with the far more practical and desirable 4speed box and an engine that was pristine and I suspect has been rebuilt not long ago.

    So, Van A is now in storage with a long term plan of converting to a pickup (mainly because once I cut the rust out, it rather resembled a flatbed pickup)

    Van B is now the project bus and soon to be camper. I’ll pick up the project in the other thread.

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