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  1. #1
    Director of Training Mike Phillips's Avatar
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    Solvent Popping in Fresh Paint

    Solvent Popping in Fresh Paint


    After inspecting the brand new paint job on the 1928 Model A out in the garage I found at least one place with signs of solvent popping.

    Solvent popping is when the reducer, (solvent), which is used to thin the paint to make it sprayable in a paint gun is changing from a liquid to a gas. As this change takes place, the solvent tries to escape and pops through the top film of paint leaving a tiny little crater or what looks like a pin hole.

    At least that's the nutshell explanation.


    Here's a couple pictures I took to show solvent popping. It is located just above the opening to the rumble seat on this Model A.









    For reference, it's just above the handle you see on the top of the rumble seat in the back of the car here,





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  2. #2
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    This looks like a fun project.

    Sent from my SAMSUNG-SGH-I777 using AG Online

  3. #3
    Senior Member DaGonz's Avatar
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    Re: Solvent Popping in Fresh Paint

    What can be done to this other than a repaint?
    2007 Ford Edge SEL AWD 2006 Ford Mustang GT 2009 Ford F-150 XLT Supercab 4x4

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    Re: Solvent Popping in Fresh Paint

    Mike thats too bad pretty serious defect. I'm sure you'll pull some magic and make it look better.

    My first motorcycle helmet I painted I used too fast a solvent and ended up with this. Nothing sandpaper and a mulligan won't fix, lol.

    I'm glad mine was just a helmet, that ride looks like fun to work on.
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  5. #5
    Director of Training Mike Phillips's Avatar
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    Re: Solvent Popping in Fresh Paint

    Quote Originally Posted by DaGonz View Post

    What can be done to this other than a repaint?

    A person can try wet sanding or dry sanding, maybe even try a CarPro Denim pad and if the actual "pop" or crater is only in the top surface it can be removed or at a minimum improved.

    "You never know what you can do until you try"



    If the pop created a tunnel from where it originated to the surface then grinding on it will just uncover more of the tunnel and remove precious paint needlessly.


    These look like they will fix.


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  6. #6
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    I have used a UV clearcoat in the past to dab into the pinholes , depending on how many. Then sand and polish back up.

    They don't look too deep though.

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  7. #7
    Director of Training Mike Phillips's Avatar
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    Re: Solvent Popping in Fresh Paint

    Quote Originally Posted by ken tuep View Post
    I have used a UV clearcoat in the past to dab into the pinholes , depending on how many. Then sand and polish back up.

    They don't look too deep though.

    That's sound very tedious...

    Hats off to you for tackling such a procedure...



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  8. #8
    Senior Member Bill1234's Avatar
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    Re: Solvent Popping in Fresh Paint

    Mike, I have them same problem on a freshly painted (about 120 days). bumper. Its like those on the Ford, except there are only two but they are bigger
    Bill 1234
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  9. #9
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    Quote Originally Posted by Bill1234 View Post
    Mike, I have them same problem on a freshly painted (about 120 days). bumper. Its like those on the Ford, except there are only two but they are bigger
    Sounds like they may be fish eyes.

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  10. #10
    Senior Member RedXray's Avatar
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    Re: Solvent Popping in Fresh Paint

    You run into this imperfection(s) when you rush flash times, usually in a production type scenario. Use the slowest reducers and activators you can get by with and extend the flash times on the p-sheet (product sheet), especially on hot and humid days. I push primers and basecoat flash times to their max, then hammer on the clear coats as they tack. These pops are on the very top (30 - 50%) of the clearcoat and often can be completely removed.

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