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Magnesium restoration

Discussion in 'The Hokey Ass Message Board' started by Carrosr, Jun 19, 2017.

  1. Carrosr
    Joined: Oct 27, 2013
    Posts: 10

    from Milwaukee

    Who restores vintage American Racing wheels made out of Magnesium?

  2. it depends on what you need. post pics.
  3. Im going to watch this, I have a pair of Magnesium Wheels I need to strip and re paint.
    I have heard all kinds of things from cooking out moisture at 300deg, special Zinc primer/ sealer to keep them from reacting, DOW 7 Chemical conversion, etc. I looked at Aircraft Spruce but got lost in all their products for reconditioning Magnesium.
    Last edited: Jun 20, 2017
    King ford likes this.
  4. Carrosr
    Joined: Oct 27, 2013
    Posts: 10

    from Milwaukee

    I've been told by the shop working on my car that there is a hairline crack (I'm not sure were) but they think can be welded however they don't want to do it. I also wanted the drill holes on the outside rim filled in. Then just polish them up.

    Attached Files:

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  5. rjones35
    Joined: May 12, 2008
    Posts: 335


  6. Roothawg
    Joined: Mar 14, 2001
    Posts: 16,995


    Last edited: Jun 20, 2017
    Mark Hinds likes this.
  7. DDDenny
    Joined: Feb 6, 2015
    Posts: 6,032

    from oregon

    You may want to have both wheels (completely) Zyglo tested, there could be many more cracks that are not readily visible.
  8. Hot Rod Cowboy
    Joined: Jan 2, 2010
    Posts: 212

    Hot Rod Cowboy
    from Scurry, TX

  9. Zyglo testing looks interesting, like a liquid magnaflux.

    I need to paint mine, so If I understand the process correctly; Strip (Non Abrasive), bake to remove all moisture and contaminants, Dow 7 coating, then whatever top coat I want. They need to go back to factory silver for my project.

    Mag can be welded, but if you do the holes on the rim, it will probably show as a shadow when you polish them. Were you planning to re-paint the centers too?
    Mark Hinds likes this.
  10. There is a welding shop in racine that welds magnesium. The chemicals to dow 7 can be bought at aldritch chemical in milwaukee or there is a shop in chicago that will do it for you.
  11. Fabber McGee
    Joined: Nov 22, 2013
    Posts: 245

    Fabber McGee

    Put slotted head screws in the holes like the guy who drilled them intended. Absolutely period correct.
    bowie likes this.
  12. Magnesium is terribly porous and requires a good thorough paint inside the wheel to seal them from slowly loosing air. I had a set of mags and one would invariably require weekly air top up. I had the tire shop tank test the mounted wheels and found there were several tiny holes near the bead.

    After much research, I ended up talking with helicopter mechanics knowing they encounter these metals routinely. They recommended two part epoxy primer such as PPG Deltron DPLF mixed with DP401LF or DP402LF Catalyst.
  13. alchemy
    Joined: Sep 27, 2002
    Posts: 10,617


    All the magnesium wheels that run on the cars in my family are bare, no paint. But, they all have tubes too.

    I've heard of guys painting the insides, as well as clearing the outside after polishing, only to have corrosion that is trapped underneath making small trails and flakes in the paint. Evidently you would need to perfectly clean and immediately paint the magnesium to prevent any atmosphere from starting the new corrosion. As any mag wheel owner knows, it doesn't take long at all for the "patina" to start.
    bowie likes this.

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