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Sand and Polish Aluminum To Mirror Finish

Discussion in 'Open Bar!' started by huskystafford, Jan 11, 2019.


  1. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    I was checking stuff on aluminium for my self and found this video. So I am posting it here just in case someone would find this interesting.


    doc1, J000seph, SiRoxx and 1 other person like this.
  2. Druart

    Druart Young Tutorling

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    Wow that is shiny


    Sent from my iPad using Tapatalk
  3. Vladimir

    Vladimir Detail Decepticon!

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    Using steel wool for applying polishing compound after 5000 grit sounds like evil joke:) That even wouldn't come in my mind.
    Guy should mention kinda "finest steel wool" or smth. What for to use steel wool there I have no idea.

    @huskystafford what sort of aluminum are you polishing?
    I need now to polish some soft aluminum, it's another story compared to sand and polish hard aluminum. BTW in the things I'm working on both types are involved. I know that soft one is going to be headache, for it's not only soft but rounded and angled shape.
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  4. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    Not polishing anything yet. I am looking at the equipment, what I need to buy to polish alluminium and metal panels and other objects from that material. Any good info is welcomed :)

    I basically need sanders so I can sand and prime panels, then I will need something to buff. I think. lol

    I don't wanna hand sand and waste my time. -.-
    Last edited: Jan 11, 2019
  5. Vladimir

    Vladimir Detail Decepticon!

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    I sanded and polished the aluminum only manually. It's soft material and cuts real easy and fast.

    Guys makes the "mirror" only in the meaning "shiny". Look at the reflection;) The way how and with what he did the process would never make flat mirror. Wavy and shiny what it is.



    Sanding for priming and polishing are two different stories. For sanding before the priming you need 5mm eccentric orbital sander, for finishing sanding 3mm orbit. For polishing without eccentric function - special polishing machine with low RPM. The drill is definitely not for that;)
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  6. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    I found bunch of orbital eccentric sanders, but I didn't see info about 5mm or 3mm. I checked the ones for electricity and the pneumatic ones.

    oh damn, I just notices on this one 5mm:
    https://www.multistore.si/ekscentricni-brusilnik-black-line-150mm-s-cevjo-za-odsesavanje
    - število vrtljajev: 10.000 min-1 = rpm
    - premer diska: 150 mm = disk size
    - ekscenter: 5 mm = eccentre
    - teža: 1.15 kg = weight
    - poraba zraka: 200 l/min = air consumption
    - priklop: 1/4˝ = type of connection
    - sesalna cev 1.5m = lenght of hose for suction
    - sesalna vrečka = bag for dust


    How do I know if equipment is worth the money? I need it to last... In my logic pneumatic would last longer cause there is less to brake? -.- lol :D


    I found bunch of cheap ones and the ones for 300 euros. What's the difference?

    for example versus this one which is almost 200 euros...
    https://www.ideo.si/ekscentricni_brusilniki/Brezoljni_ekscentricni_brusilniki_UT_8775_OMEGA_AIR

    it says it's without oil...
    število vrtljajev: 11.000 min-1
    - teža: 0,9 kg
    - poraba zraka: 276 l/min
    - priklop: 1/4˝
    - hrupnost: 78 bB(A)



    or this one maybe:

    https://www.ideo.si/ekscentricni_brusilniki/rotacijski_brusilnik_D26410_DeWALT
    this one is electric for 320 euros gonna kill my self lol
    Last edited: Jan 11, 2019
  7. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    And thanks for help Vladimir! I am right in front of buying sanders, money is already saved, just don't have a clue what to buy, so I am doing research.
  8. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    Last edited: Jan 11, 2019
  9. Vladimir

    Vladimir Detail Decepticon!

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    I've told you the difference. 2,5mm or 3mm - for fine work, 5 and above - for rough works, up to the stage of primer. After priming think 2,5 - 3mm.

    What compressor do you have? If it can supply the sander with the air, does not mean you can use it normally with your compressor. Your compressor should have twice or more productivity of the tool air consumption. In other way compressor will die quickly. In general, you must have real shop beast to run pneumatic tools.
    Another thing about pneumatic sanders, you can not normally regulate the rotation speed compared to electric sanders. Electric sanders work at constant set speed, while pneumatic lower the speed if you press them harder. Generally, no electronics to keep the speed constant.
    Pneumatic sanders are real convenient though. For rough works they would be good though.
    BTW, have you heard the sound of pneumatic tools? Maybe you will decide not to use them;)
    But there's something with good properties of pneumatic sanders. Mirka Ceros or Deros models.
    I will somehow buy one for final fine sanding. They're light and convenient. People say they are great. Besides, professional tools.

    I have electric Rupes with 5mm eccentric. The thing is relatively big, but for rough work it's more than OK.

    Generally, if you wanna go professionally, think about Rupes, Mirka, Festool sanders. Festool is cool, but the price... Though, it will last for decades.
    For polisher I use Makita 9227 CB.

    Don't throw money on the wind;)

    That one worth that does the job correctly and brings the money back. Pleasant work must be included in the tool:)
    Don't buy cheap. In this case you will not win the lottery.


    They might work if your surface on the back is like kinda glass already, I suppose.

    There's thing called vacuum table that would work, but you know, the price...:(
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  10. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    Great info Vladimir!
    my compressor:
    https://www.airbrushforum.org/threa...her-big-best-friend-adults-only-thread.21091/
    https://www.ideo.si/kompresorji/BATNI_KOMPRESOR_BREZOLJNI_TIHI_DPS_2_2_90_OMEGA_AIR
    Last edited: Jan 11, 2019
  11. Vladimir

    Vladimir Detail Decepticon!

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    I would never believe that thing can give 400l/min even for suction, not talking about its real air productivity. In general, for pneumatic tools you need 3 phase big compressor. 240 V compressor is not for the tools.
    I'd never use it for pneumatic sanders. Spare the compressor!:)
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  12. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    so I need 2 orbit electric ones and one needs to be 5mm eccentric orbital sander, the second one needs to be 3mm orbit but not eccentric right? :D
  13. Vladimir

    Vladimir Detail Decepticon!

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    Yeapp!:) You need two. 5mm can be bigger and heavier, read lower price. 3mm - smth light weight, like Ceros/Deros, but it's more expensive. Though you can work with one hand in this case.


    Not right:) 3 and 5mm mean the size of the eccentric. I can't even imagine you sanding with 3mm pad sander:D Loooong way to sand something with this sizelol

    Forgotten to say. Buy only those 150mm pads.
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  14. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    :p

    I can handle jokes on me :D
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  15. Vladimir

    Vladimir Detail Decepticon!

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    You know well it's friendly;)
    But still, have you tried to imagine that?:)
  16. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    yep, the dremel one lol

    On to the topic :p Why 3mm needs to be low rpm and how low it needs to be?
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  17. Vladimir

    Vladimir Detail Decepticon!

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    Even Dremel doesn't know that size:)

    For 3mm you use finer grits, that means more area of contact, that causes more friction and heating. You can freely burn the clear. Besides, cut paint material particles don't go away so easily and fast as with rough grits and bigger orbit. Those particles also add heating.
    For not to burn the paint/clear film you must move the sander constantly, do not stay at one place for not to overheat the surface. Start working at low speed and raise it a bit. You will understand how it works.
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  18. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    thank you :)
  19. Robbyrockett2

    Robbyrockett2 Air-Valve Autobot! Very Likeable!

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    Yes steel wool is a horrible thing for that.

    Even the finest steel wool will impregnate aluminum with tiny bits of steel......then they rust.
    Destroying your work by creatimg lots of micro-rust specs and lines which mostly shows as just being dull quickly.

    Steel wool for polishing is really only good for ceramic coatings, since most other polished items are corrosion resistant metals and or soft.
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  20. Robbyrockett2

    Robbyrockett2 Air-Valve Autobot! Very Likeable!

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    Dynabrade is probably your best value for money. Oh, nevermind, you'll need electric.....I hate electric.

    When you use an electric you must have it held on the piece bfore turning it on and be sure to turn it off and wait for it it slow down or stop before lifting it.

    Otherwise they go to crazy high rpm and destroy your pad or their chuck.
    Last edited: Jan 12, 2019
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