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Thread: Rust disolver

  1. #1
    Registered Member max46's Avatar
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    Post Rust disolver

    Has anyone used Eastwoods Rust Dissolver? I removed all the guts from my front doors and got rust. (duh) The rust is not through the metal but its in places that are not that accessible with a wire brush. According to the ad, it dissolves the rust and then you can paint over it. I would probably use Eastwoods Encapsulate paint to finish the job.

  2. #2
    Registered Member BAM55's Avatar
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    No but I have used the phosphoric acid at Home Depot. It cost about 20 bucks for a gallon and you can cut if 50/50 with water. Here is the results of my frame after a couple of sessions of the 50/50 mix. For the frame I sprayed it and wrapped it in plastic so the the stuff would stay wet longer. Its active as long as its wet.



    Here is what it looks like its under 20 bucks.


    Here is a before and after shot of my hood. I used phosphoric acid I mixed it 50/50 in a spray bottle.


    Last edited by BAM55; 07-08-2013 at 06:26 AM.

  3. #3
    Administrator 567chevys's Avatar
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    I have also used phosphoric acid to clean metal , They used it for swimming pools also
    make sure you mixed it 50/50
    I have also used it to clean Cement

    Sid

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  4. #4
    Registered Member NickP's Avatar
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    It's not worth the plastic it's packaged in - gotta free one gallon if ya want to come get it.

  5. #5
    Registered Member chevynut's Avatar
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    Nick, what do you mean? Phosphoric acid is the active ingredient in most metal prep solutions.

    I have been looking for a source for it, so thanks. I use muriatic (hydrochloric) acid to remove rust on some things, but it also attacks the metal so you have to be careful. I tried to find "Milkstone Rinse" (contains phosphoric acid) when I was in Texas but couldn't find any. Guys tell me it removes rust very nicely without attacking clean metal.
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  6. #6
    Registered Member NickP's Avatar
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    I'm talkin about that worthless Eastwood product - true phosphoric works like a champ!

  7. #7
    Registered Member BAM55's Avatar
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    NWC,

    I'm glad you cleared that up.
    Last edited by BAM55; 07-08-2013 at 09:10 AM.

  8. #8
    Administrator 567chevys's Avatar
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    ME Too



    Sid

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  9. #9
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    Note that there's a difference between the metal prep solutions and phosphoric acid.

    My experience with phosphoric acid is that the clean metal flash rusts very quickly. Maybe is was just the weather the time or two I tried to used it. The metal prep solutions leave a zinc phosphate coating that allows the surface to avoid surface rust for a fairly long time.

  10. #10
    Registered Member BAM55's Avatar
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    No Rick I don't think its just your experience its been mine also. The prep and etch I use says you can paint over the coating but I never trusted it. So I rinse it off and yes it does flash rust quickly, so I wipe it dry and wire wheel and sand the flash rust and coat with epoxy primer.
    Last edited by BAM55; 07-08-2013 at 12:35 PM.

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