Wicked paint reaction - why?

Mopar Body and Trim

  1. challengergary

    challengergary Well-Known Member

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    My brother shot his 71 Camaro yesterday and had some serious issues with a reaction between the paint and primer. What caused this? Luckily, it was isolated and most of the car looks great.

    The primer used was 5 Star 5425 2K Urethane and the paint was H.O.K. Apple Red KandyBase. Clear was Valspar.

    I used the same basic combination on the 70 Challenger I painted Friday and had zero issues
     

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  2. memike

    memike Super Moderator Staff Member FABO Gold Member

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    I have not painted in a long time and don't know about the new paints and primers
    I have painted allot back in the 90'es and that looks like some one did not let the primer
    cure or it did not get scuffed/sanded well, or good enough to let the primer release the . the.... heck I can't think of the word/name of what it holds in the primer that must be released before painted.. sorry I am old school, and yes this has happened to me before
    with enamel and base coat/clear coat....... Did this happen after the clear was shot ?
     
  3. ef8340

    ef8340 Well-Known Member

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    was the reducer too hot? im not a painting expert but I had a similar issue when I painted I still had some of the cleaning thinner in my gun and it did the same thing
     
  4. CudaChris67

    CudaChris67 Well-Known Member

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    could be that wax and grease remover was not properly wiped up and allowed to dry

    could be the base wasn't allowed to flash long enough if that was the last part based and first cleared- or if the base got a little heavy there and needed extra time
     
  5. memike

    memike Super Moderator Staff Member FABO Gold Member

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    :thumleft: sounds like a very good possibility
     
  6. memike

    memike Super Moderator Staff Member FABO Gold Member

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    Could have happened if that was a starting spot, I bet he does like most of us and has a big red spot on the wall or a piece of card board he starts/test his gun before going to the car :D
     
  7. memike

    memike Super Moderator Staff Member FABO Gold Member

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    Looks like the paint was sprayed on body filler and should have been primed and scuffed don't it :glasses7:
     
  8. doug 371

    doug 371 Well-Known Member

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    incorrect flash time...maybe temp difference in that corner or too much material
     
  9. 1968FormulaS340

    1968FormulaS340 Well-Known Member

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    Incorrect flash time would be my first guess too.
     
  10. /6 Matt

    /6 Matt 30 Degrees Crooked

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    My first guess is that even paint runs away from camaros...
     
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    • stilliniraq73

      stilliniraq73 72scampjocky

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      I'd say the wax grease remover is the culprit....
      I painted the inside quarters in my scamp and got the same reaction, just after I had wiped them down with wax remover....too anxious to get it done, so I had to slow down and do it again..
       
    • challengergary

      challengergary Well-Known Member

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      Yeah, my brother admitted he was in a hurry and really laid the paint on. Patience grasshopper...

      Also, I gave him a new nickname Mr. Krinkle

      [ame="http://www.youtube.com/watch?v=TOdo7dhvSwg"]Primus - Mr. Krinkle - YouTube[/ame]
       
    • Sedanman

      Sedanman 67-9 Valiant specialist

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      Lol,cool song
       
    • rmazess

      rmazess Well-Known Member

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      wax and grease remover contamination.
       
    • 95teetee

      95teetee Well-Known Member

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      I like this answer lol.
       
    • Abodybomber

      Abodybomber Breaking street machines , since 1983.....:) Legendary Member

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      Primus rocks,lol. Looks like lack of patience. Or possibly, a reaction,to the clear coat reducer. Why I wash down,with Simple Green,wait 24 hours.( as for wax and grease remover....).Less chemicals involve,smoother transition.
       
    • bad440

      bad440 everything,all the time..

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      shot the clear while the basecoat was dry.i usually base it then look the whole thing over and shoot the clear the next day.....
       
    • challengergary

      challengergary Well-Known Member

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      Spoke with my and it looks like it was really just a lack of patience on his part. He did not allow the first coat of basecoat to truly flash before he shot the second coat. Plus his second coat was too heavy. Expensive lesson for him to learn but I bet he does not do that again.
       
    • DaveBonds

      DaveBonds Garage Trash

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      That base looks insanely heavy.

      I don't think this has so much to do with wax/ grease remover as it does flash time in between base coats and how heavy each coat is.

      Wax and grease remover usually flashes within enough time to clean/ check the gun and mix base. By the time you've gone over the car with a tac cloth and you have the paint in the gun, that wax/ grease remover is gone.

      Look at the film thickness on those ridges. That tells you right there what the problem was. Solvents from prior base coats trying to flash, under a new film of heavy base.

      Take your time with base. It's all about even color. Better off with light coats, then light to medium coats, multiple times.

      I clear in the same session, but I go around the car after 15 min with the last of the base in the gun, nib any dust with 1000 and blend those spots, come back in with the clear gun in one hand and a tac cloth in the other, hit the entire car before clearing. I also tac lower areas during base to keep from dust buildup. Shoot the roof, come back in, tac off the hood and decklid. I go through about 3 tac cloths with every complete paint job. Night and day quality of layout when it comes to metallics, too.
       
    • BillGrissom

      BillGrissom Well-Known Member

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      I got the same wrinkling in a few spots when I sprayed epoxy paint over Rust Destroyer primer too soon. It said to wait 72 hours and I did, but today I give it a week or leave it in the sun for a few days. It wrinkled in inside corners where it dries slower. The primer is mostly mineral spirits type solvent.
       
    • AdamR

      AdamR Big Member

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      I agree, looks like the same issue I had last year trying to do wet on wet from epoxy to 2k primer. Even following the recommended times.
       
    • Hyper_pak

      Hyper_pak Old School Chrysler Fan

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      Just like that movie the Jerk! I think the paint didn't want to be on that bowfly!
       
    • varmintjcl

      varmintjcl Well-Known Member

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      I think ef8340 has the answer....I used this same combination, all looked great so I went to watch a football game & had this effect when I returned...Called the paint mfg & turned out the paint store had sold me the wrong reducer!!!
      They replaced the paint, but I had to sand it all back down & redo it!!!
       
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