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Combatting GM paint disease???

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Cavalry, Nov 9, 2001.

  1. Cavalry

    Cavalry 1/2 ton status

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    I am looking at buying another K5. This one has a mild case of bad GM paint. What is the best wat to fix it? I am familiar with painting techniques I am more concerend with how to prep the area. If I feather everythimg in with a DA I will hurt the galv metal. I was thinking about DAing the area around and using featherfill or high build primer to fill the missing paint area. Any painters out there know the proper way to fix it? What exactly causes it besides a poor adheasion between the galv and paint? If I repaint the whole truck what stops it from still blowing throught my new paint in new areas? I am not really too crazy about the idea of stripping the whole truck down.

    "There is a fine line between hobby and mental illness"
    Luke
    84 K5
     
  2. solowookie

    solowookie 1/2 ton status

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    sand it down to primer, and repaint...

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>link to k5's</a>
     
  3. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    Well the problem is that GM thought it would be funny to reformulate their primer for better metal adhesion. Well it stuck to the metal all right, just that paint wouldn't stick. The grey colors seem to be a bad mix and don't stick either. My all time favorite is on my cousin's suburban. Back in the mid 80's a GM truck plant went on vacation. They had the whole line up all primered before they went on vacation. They came back from vacation and forgot one important step, sanding. Kinda funny I think, I gotta find the recall on it. I don't know if its true or not but I've heard the story before.

    <a target="_blank" href=http://www.geocities.com/bigkern76>http://www.geocities.com/bigkern76</a>
     
  4. Blazin Obsession

    Blazin Obsession Registered Member

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    I had the same problem with my 84 pick up. I looked for a cheap and easy way to make the repairs but found that sanding off all the paint was the only sure way to cure it.
    Ken

    <a target="_blank" href=http://www.blazinobsession.com/>http://www.blazinobsession.com/</a>
     
  5. Blazin Obsession

    Blazin Obsession Registered Member

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    I had the same problem with my 84 pick up. I looked for a cheap and easy way to make the repairs but found that sanding off all the paint was the only sure way to cure it.
    Ken

    <a target="_blank" href=http://www.blazinobsession.com/>http://www.blazinobsession.com/</a>
     
  6. BrianK5

    BrianK5 Registered Member

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    I WISH I just had bad paint to battle. I've got GM rust disease! It won't be easy or quick, but sanding down to metal and reapplying primer and paint is the only way to go.

    1985 K5 Blazer
     
  7. Cavalry

    Cavalry 1/2 ton status

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    So the general consensus is that I should try to sand it down as close to the galv without going through it? Sounds entertaining. Anyone have any wisdom on how to prevent future blowouts, Or should I just go to town with the pressure washer and see how much comes off?

    "There is a fine line between hobby and mental illness"
    Luke
    84 K5
     
  8. solowookie

    solowookie 1/2 ton status

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    hey, if you can get it off with a power washer (or at least a lot of it) why you even asking?

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>link to k5's</a>
     
  9. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    yeah it's the primer, my sub is gettin really bad i got alot of it off with a pressure washer though. so now the sub is half primer half white.

    SWAMPERS RULE!!
    scott,
    1989 GMC suburban 3/4t 4" lift finally rollin on 36" swampers, tbi350, th350, np241
     
  10. dyeager535

    dyeager535 1 ton status Premium Member

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    I'm pretty sure the top surface isn't actually galvanized, if anything, its a galvanized primer. That site with all the K5 dealer brochures had some info on that, at least one of the brochures did. Mentioned all the rust preventive measures, then went on to list half the truck as not being anti-corrosion protection.

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?
     

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