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Technical Help for older PPG DP90LF paint job?

Discussion in 'Traditional Hot Rods' started by modified, Jun 21, 2016.

  1. modified
    Joined: Sep 21, 2006
    Posts: 326

    modified
    Member

    My little modified was painted about 12 years ago with DP90LF and it's getting dull and chalky looking. It's had road oils, dirt, WD40 and other contaminates on it over the years so I think it would be a bad idea to try to clean and flat clear coat it. I really don't want to repaint it!
    Does anyone have a successful easy way to keep an old DP90 finish looking good with a little shean to it??? Do any Wipe Down products work, waxes, Armor All, WD-40, any ideas or just live with it?[​IMG] [​IMG]

    Sent from my SM-N900V using H.A.M.B. mobile app
     
    Last edited: Jun 21, 2016
  2. Gearhead Graphics
    Joined: Oct 4, 2008
    Posts: 3,888

    Gearhead Graphics
    Member
    from Denver Co

    When I had a really poor paint job I was trying to milk the life out of... and didn't care much about at the same time. I washed it with comet and a sponge, took out all the oil stains and surface contaminants off, left it with a dull shine.
     
    need louvers ? and modified like this.
  3. squirrel
    Joined: Sep 23, 2004
    Posts: 59,311

    squirrel
    Member

    I had a 14 year old (DuPont) URO primer paint job on my 55 chevy, I just washed it good and sanded it down and had a friend spray on some acrylic enamel. Came out real nice.
     
    modified likes this.
  4. Iv seen my Unkel Fred wipe down his car with a rag and transmission fluid. It was chalky and oxidizing and after the trans fluid it would look clean and shine. Not pour in on just enough to kind of hand rub it out would last for awhile.
     
    modified likes this.
  5. squirrel
    Joined: Sep 23, 2004
    Posts: 59,311

    squirrel
    Member

    That is not something you'd want to do if you plan on painting the car ever.
     
    luckythirteenagogo and modified like this.
  6. modified
    Joined: Sep 21, 2006
    Posts: 326

    modified
    Member

  7. Soak it in cider
     
  8. modified
    Joined: Sep 21, 2006
    Posts: 326

    modified
    Member

  9. deathrowdave
    Joined: May 27, 2014
    Posts: 4,901

    deathrowdave
    ALLIANCE MEMBER
    from NKy

    Great idea about soakin it , only issue is when you do that money for your rod seems to leave fast ! [emoji848]
     
  10. lippy
    Joined: Sep 27, 2006
    Posts: 6,857

    lippy
    Member
    from Ks

    You could always sand it and.........(EEK) paint it?:D Lippy
     
    squirrel and modified like this.
  11. snopeks garage
    Joined: May 25, 2011
    Posts: 556

    snopeks garage
    Member
    from macomb MI

    That is epoxy primer on your car. You can not restore the finish without re doing it. DSC_00041-2.jpg Your best bet it to cleen it good with dawn soap then wax and grease remover. send it down with 400 grit and spray it with SEM hot rod black. It's a single stage urethane so it will not fade and it will last a life time. I used it on my truck 5 years later looks like new still.
     
    luckythirteenagogo and modified like this.
  12. modified
    Joined: Sep 21, 2006
    Posts: 326

    modified
    Member

  13. I was going to say steel wool but this ^^^ will bring the same end result.

    The WD40 was a bad idea, for paint that DP90 is going to have to come off and is the WD40 has made its way to the sheet metal, it will need to be pickled. Self Etching primer won't cut it. WD40 is good stuff for drying out a wet distributer and sometimes works on moving parts that are trying to seize. really bad idea for paint I am afraid.
     
  14. I used DP 90 years ago,as we all know it's a epoxy primer and looks great when first applied but as time passes it gets chalky and looks bad,I love the look of primer but it just doesn't hold up.

    I used Kirker S.G. black on my pickup and it holds up great. HRP
     
  15. paul55
    Joined: Dec 1, 2010
    Posts: 3,491

    paul55
    Member
    from michigan

    You can actually buff it to a sheen, or wipe it down with Pledge. Here's a pic of a friends coupe that was buffed. parts for sale 043.JPG
     
  16. ol'stinky
    Joined: Oct 3, 2010
    Posts: 383

    ol'stinky
    Member
    from New Jersey

    I've seen this stuff advertised, but never used it.
    http://www.ratwax.net/

    Also I work with a guy that has a matte black toolbox and Snap-on sold him some stuff to maintain it called "matte and flat finish cleaner''. Smells like pledge though.
     
  17. What Matt said....it's a good epoxy primer...not something you would put clear over...you can also have your local jobber mix you up some single stage with some flattener added to it
     
  18. I've done the bucket of water and comet deal before, used a scratch pad from under the kitchen sink and just washed it. Left it with a flat finish but it was clean again.
     
  19. snopeks garage
    Joined: May 25, 2011
    Posts: 556

    snopeks garage
    Member
    from macomb MI

    Also to add I used a product made by wizards called wipe down it's for flat and semi gloss paints. It's what I used on my truck and works great!
     
    modified likes this.
  20. Wheeliedave
    Joined: Jan 6, 2011
    Posts: 231

    Wheeliedave

    I've got the paint problem on my A roadster. I used DP90 in 1999 and now it doesn't look anywhere near as nice as it did then. I think I will clean, sand and respray as well.
     
    modified likes this.
  21. lippy
    Joined: Sep 27, 2006
    Posts: 6,857

    lippy
    Member
    from Ks

    I hate to say this but DP40 Or 90 was never designed as a topcoat. Lippy
     
    Last edited: Jun 23, 2016
  22. indyjps
    Joined: Feb 21, 2007
    Posts: 5,393

    indyjps
    Member

    Panel prep Degreaser and scotchbrite, get a real scotchbrite. White is approx 1000 grit, rub in straight lines.

    Don't use an oil based product.
     
  23. A Boner
    Joined: Dec 25, 2004
    Posts: 8,071

    A Boner
    Member

    Looks good to me.....just drive it!
     
    modified likes this.
  24. Of course you're going to get a thousand reply's about this but I would say wash it real good with Simple Green first. You want it strong, nearly full strength.

    What happens a lot of times is oils and waxes from all sorts of things contaminate the surface and change the way the paint reflects or refracts light. Especially on flat or suede paints and primers.

    Clean it real good and then make up your mind. You may be surprised how much it comes back to life.
     
    modified and cptn60 like this.
  25. modified
    Joined: Sep 21, 2006
    Posts: 326

    modified
    Member

    For now, that's what I'm going to do!

    Sent from my SM-N900V using H.A.M.B. mobile app
     

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