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The molasses bath removes rust but leaves paint, right?

Discussion in 'The Hokey Ass Message Board' started by Kevin Lee, Jan 31, 2006.

  1. Kevin Lee
    Joined: Nov 12, 2001
    Posts: 7,656

    Kevin Lee
    Super Moderator
    Staff Member

    I went to a local antique store to find some small chairs for my daughter's play room. And instead found a set of what I think are NOS 1932 Missouri license plates tucked away in a booth. Stupid cheap.

    They are not in perfect shape, but I don't believe they were ever on a car because they were wrapped in a sort of strange, very thin white paper and the paint in the middle (where it isn't rusted) is flawless.

    At some point they attracted moisture and rusted around the very outside edge. Really crusty rust. Not something I want to try to sand or mess with too much mechanically because it's so close to the good paint on the Missouri lettering.

    I'm hoping I've remembered this correctly and can give them a bath, rinse, and touch up the black background with some one-shot. Anyone have a picture of something coming out of the soup?
     
  2. 3wLarry
    Joined: Mar 11, 2005
    Posts: 12,804

    3wLarry
    Member Emeritus
    from Owasso, Ok

    ...pics Kevin, and let me know if you want to turn them 'cause I don't have '32 Missouri yet...;)
     
  3. Kevin Lee
    Joined: Nov 12, 2001
    Posts: 7,656

    Kevin Lee
    Super Moderator
    Staff Member

    I'll try to get some pictures.

    Not for sale though. You know those stories where someone finds a part and builds an entire car around it?
     
  4. warbozz
    Joined: May 29, 2005
    Posts: 720

    warbozz
    Member

    My dad found a whole box of those NOS '32 Missouri plates in the mailing envelopes years ago, apparently they way overproduced for the year. They were all stuck together too. Don't try just prying them apart- the back plate will lose a lot of paint. My dad tried that, so I know. Molasses sounds like a safe thing to try, and I don't see why it would eat any of the paint.
     
  5. Anything I have done in molasses....rust dead, paint still living.
     
  6. zman
    Joined: Apr 2, 2001
    Posts: 16,787

    zman
    Member
    from Garner, NC

    my understanding is it will clean it to bare metal. not that I'm sure but let's keep it up top until someone can let you know for sure.
     
  7. lik2writ
    Joined: Feb 12, 2004
    Posts: 434

    lik2writ
    Member
    from NY

    Dont know about molasses on lic plates, but go here first.
    http://www.alpca.org/faq.cleaning.html

    My 29's had most of the original paint but had probably more rust stain and crust than what you described for yours. I sent them to an alpca member to have them cleaned while preserving the original paint. Both of mine needed to be straightened too. I was more than pleased.
    There is a guy on Fordbarn who will either e-mail or hard copy a restoration pamphlet for various cleaning and restoration methods for hobbyists and restorers. 10 or 11 bucks. I am going to send for mine soon as soon as I dig up his address again.
     
  8. Pyro
    Joined: Jun 6, 2005
    Posts: 87

    Pyro
    Member
    from Marcy, NY

    can some one tell me more about this molassis cleaning, i need a metal tank fr my bike derusted.. might b worth a shot??
     
  9. lik2writ
    Joined: Feb 12, 2004
    Posts: 434

    lik2writ
    Member
    from NY

    Pyro...try to run a search here on the board, it has been discussed some time ago, you may find the link to a website where a guy did a coupe that way. Also, just do google.
     
  10. noboD
    Joined: Jan 29, 2004
    Posts: 8,864

    noboD
    Member

    Kevin, I've used the molassas trick on several things with paint. It will take off the rust, but probably ruin the paint. Some things come out OK others it loosens the paint and changes the color. Mybe some Gibbs around the edges?
     
  11. SUHRsc
    Joined: Sep 27, 2005
    Posts: 5,099

    SUHRsc
    Member

    if its really crusty the mole-asses will eat holes in it....its really just removing rust i guess but i put a rear deck for a roadster in that i thought wasnt too bad and it came out swiss cheese. you might be better off just getting it clean with a wire brush and put a little filler on then paint it?

    good luck
    zach
     
  12. 286merc
    Joined: Mar 3, 2001
    Posts: 1,793

    286merc
    Member
    from Pelham, NH

    The molasses only eats the iron oxide and leaves good metal untouched. Filler over wire brushed rust will just come off as soon as moisture gets under it.

    One thing that works well is to put Zero Rust red oxide over the wire brushed panel and then skim mud over it. ZR is chemically compatible with the fillers.

    www.zerorust.com for info
     
  13. 286merc
    Joined: Mar 3, 2001
    Posts: 1,793

    286merc
    Member
    from Pelham, NH

    It is a very old farmers method, at least into the 1800's.
    The molasses must be the sulfated variety, commonly used for horse feed and sold in feed and grain stores for example. There are also small bottles available in some grocery stores but most sold there is unsulfated.

    The mix ratio is 4-5 parts water to 1 part molasses. Mix completely in warm water. The part must be steel or iron, no aluminum, copper, potmetal, etc as it will eat it. The process takes 1-2 weeks depending on temperature. The fumes are not toxic but they can get ripe so put it somplace besides the kitchen. Cover it and remove the top scum every few days and stir the remainder.

    It WILL NOT remove grease, oil and dirt. It will get under loose paint and lift it. Ive had flathead blocks come out clean also, dont know what paint was used, others still had the paint on them.

    Ive been using for ages to clean blocks and just about anything else where Im not against the clock.
     
  14. stealthcruiser
    Joined: Dec 24, 2002
    Posts: 3,750

    stealthcruiser
    Member

    check with Grimlok,

    he's used that molasses trick before.
     
  15. Dirk35
    Joined: Mar 8, 2001
    Posts: 2,067

    Dirk35
    Member

    I used the Molasses on the Windshield Crank Mechanism for my 35. Took the rusty areas to clean new looking steel......well, everywhere that there was NO grease or oily metal. I Didnt clean them very well the 1st time and they came out looking like Holstein Cow, with clean spots and rusty spots after three weeks of soaking.

    Took the parts apart (they came apart easily after the 1st soaking). Cleaned them with scrubby pad and dish soap. Then tossed it the dish washer *still rusty areas aroung the pivot joints and the gear mechanism.

    Two more weeks of soaking and they came out beautifully. The Acid in the Molasses didnt seem to attack the clean metal either, just the rusted areas.
    I was happy with the results.

    ---- -- -- -- - --- -- -- -- --- - - -- --- - -- -- -- -- -- - -- --- ---

    The following "below the dotted line" is only my guess and not based on experience:
    It would not attack the painted areas unless you left it in there for like a really long time (6 months), then I think it would slowly delaminate the paint....... but that is only a guess as my experience didnt even penetrate oily areas.
     
  16. that was funny
     

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