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Thread: De-anodising alloy "how to"

  1. #1
    The Doctor cabbie's Avatar
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    Default De-anodising alloy "how to"

    Important: this MUST be done outside, and protective gloves and eye wear should be used.


    Here's what I used:

    Caustic soda.
    Bucket.
    Mixing stick.
    Scrubbing brush.
    Scotch brite pads (Homebase in the sand paper section)
    Gloves.
    Washing up liquid




    I first filled the bucket half way and added 500g of caustic soda (about three times the recommended amount), mix it for a minute, (don't breath the fumes) drop the item in and leave it for 30 seconds, the anodising will be gone by then.




    Any stubborn parts can be lightly scrubbed, stir the mixture if it looses it's strength, this is the chassis after 5 minutes.



    Next poor almost all the caustic soda away but leave an inch in the bucket, fill with clean water, put the item in the bucket and give it a thorougher scrubbing with a Scotch brite pad.



    The last step is fill a bowel with warm water and half a bottle of washing up liquid, use a warn Scotch brite pad and give it a good clean, work the pad in one direction for the best finish.



    Give the item one last wash with clean soapy water and dry, this took about an hour.



    Just finished the chassis polish.






  2. #2
    Senior Member Lind5's Avatar
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    great thread mate
    and ya baja looks sweeeeet

  3. #3
    Now then, It's TOPPER! Topper's Avatar
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    Brilliant guide Cabbie

    What polish/method did you use to get the mirror finish on the chassis ?

  4. #4
    The Doctor cabbie's Avatar
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    Use wet "N" dry paper, start with the course and work down to 1200, then use "mothers billet polish" (if you can find any for sale!)

  5. #5
    Adminicastrator Hiks's Avatar
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    I use Peek! polish, a lot more common and is a very decent product.

    Look at the engine cover...


  6. #6

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    Good stuff Cabbie.

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    Homecare Caustic soda drain cleaner - will this work (from ASDA)? Where else can I get easily?

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    The Doctor cabbie's Avatar
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    If it's the crystal type yes, the liquid no.
    If you're under 18 DON'T watch. can't beat new rubber! Les'be friends

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    Quote Originally Posted by cabbie View Post
    If it's the crystal type yes, the liquid no.
    Best place to buy? Thanks.

  10. #10
    Adminicastrator Hiks's Avatar
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    BnQ, local hardware stores etc its about 2 quid

    *normally in the cleaning section.

  11. #11
    The Doctor cabbie's Avatar
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    Quote Originally Posted by Hiks View Post
    BnQ, local hardware stores etc its about 2 quid

    *normally in the cleaning section.

    What he said.
    If you're under 18 DON'T watch. can't beat new rubber! Les'be friends

  12. #12
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    Would it be safe to remove the anodizing from the bits that have thread like the front wheel hubs etc?

  13. #13
    The Doctor cabbie's Avatar
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    Quote Originally Posted by Chaz View Post
    Would it be safe to remove the anodizing from the bits that have thread like the front wheel hubs etc?
    Yes mate, all the caustic soda does is remove the colour from the anodising, the part treated is still anodised but in a clear coat.
    If you're under 18 DON'T watch. can't beat new rubber! Les'be friends

  14. #14
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    Quote Originally Posted by cabbie View Post
    Yes mate, all the caustic soda does is remove the colour from the anodising, the part treated is still anodised but in a clear coat.
    Thanks - did not know how corrosive it is and want to make sure the hub's surface area where it makes with the bearing remains smooth and also the threads dont get damaged.

    Im going to try and polish mine up similar to yours. Once you had cleaned them up - did you treat / paint them with anything or just left as is?

  15. #15
    Member chezzy71's Avatar
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    Default top thred

    top top thred.. b&q tomorrow buggy stripped ready to rock and roll, any thred with pictures is a good un in my book... good work fella..

  16. #16
    The Doctor cabbie's Avatar
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    Do 1 piece at a time and keep checking it every 10 seconds, some alloy can turn black if dipped too long!

  17. #17
    Member chezzy71's Avatar
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    Default deanodised in an afternoon

    would like to say thanks to cabby as the deanodise thred worked a treat didnt quite get enough coustic soda but hay got the chassis done and that good enough for me.. plus thought my baja was quite clean untill i started to strip it down..


  18. #18
    Junior Member gunner221's Avatar
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    just did mine this evening, 30-45 mins and hey presto



    now do I polish or not ???
    Last edited by gunner221; 18-01-2010 at 20:52.

  19. #19
    Senior Member Lind5's Avatar
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    looks good bud what method did you use
    keep thinking about doing some of mine but not sure
    was it as easy as people say or not

  20. #20
    Junior Member gunner221's Avatar
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    yer well easy, I got some costic soda crystals from B&Q like Cabbie suggests, and followed the instructions above, 30/45 mins later quick scrub and a clean all sorted.

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