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  1. #1
    Registered User AjaxTheDog's Avatar
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    Cleaning aluminum

    Has anyone had any luck cleaning the mottling off old aluminum parts? I have tried soda blasting, aluminum jelly and polishing compounds with little luck. Parts look cleaner but still have a mottled rather than bright shiny finish which they had when new. I'd like to get as close to that as possible. aluminum.JPG
    Bill in Highlands Ranch, Colorado
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  2. #2
    Liaison 20774's Avatar
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    I've never had to deal with that issue so far, but I notice some threads in the Similar Threads pane at the bottom of the screen...maybe there's some ideas there.
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  3. #3
    Registered User AjaxTheDog's Avatar
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    Yup, already looked there. Nothing on this.
    Bill in Highlands Ranch, Colorado
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  4. #4
    Liaison 20774's Avatar
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    I can't quite get a good view of the problem. You said soda blasting didn't work. There is more aggressive blasting like with walnut shells. I've also heard about vapor blasting. There is a link in the Opportunities thread where a member was discussing this procedure:

    https://forums.bmwmoa.org/showthread...-Blasting-quot

    Here are some other vapor blasting discussions:

    https://forums.bmwmoa.org/showthread...one-tried-this

    https://forums.bmwmoa.org/showthread...ne-cases/page3
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  5. #5
    Registered User AjaxTheDog's Avatar
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    Guess I will have to try the vapor blasting route. A local guy does it for $75 an hour. Hopefully he can tell me what level of success to expect before starting the operation.
    Bill in Highlands Ranch, Colorado
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  6. #6
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    Vapor blasting, Brook Reams, etc.

    Hi there-

    I have had great success in utilizing vapor blasting, especially on things like heads and cylinders. The finish looks factory new. The problem, of course, is that it's not always convenient, or practical, for things like an assembled engine case....

    Brook Reams gives a really nice overview of his aluminum cleaning practices on his website. The real trick in some of those methods is time. A lot of time....

    https://brook.reams.me

    Good luck!

    ECJ

  7. #7

    cleanining aluminum

    Quote Originally Posted by AjaxTheDog View Post
    Has anyone had any luck cleaning the mottling off old aluminum parts? I have tried soda blasting, aluminum jelly and polishing compounds with little luck. Parts look cleaner but still have a mottled rather than bright shiny finish which they had when new. I'd like to get as close to that as possible. aluminum.JPG
    I stopped using Simple Green 30 yrs. ago. It is very corrosive for all metals. The Air Force stopped using it about 15 yrs. ago for the same reason. They had to start replacing panels on aircraft because they were so thin from the affects of this product.

  8. #8
    Dances With Sheep GREGFEELER's Avatar
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    Quote Originally Posted by bikebombs View Post
    I stopped using Simple Green 30 yrs. ago. It is very corrosive for all metals. The Air Force stopped using it about 15 yrs. ago for the same reason. They had to start replacing panels on aircraft because they were so thin from the affects of this product.
    Please look as my previous post about this. Simple Green has a product specifically designed for cleaning aircraft that appears to have been introduced to address the problems you mentioned.

    https://forums.bmwmoa.org/showthread...=1#post1234487
    Greg Feeler
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