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Thread: Epoxy Clouding, How to fix

  1. #1
    Join Date
    Oct 2005
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    Pacific Northwest
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    Default Epoxy Clouding, How to fix

    The attached photos are my 8 feet sailing dinghy. I took the cover off today and surprise, there was all this clouding. I suspect moisture, but why is almost all of it on one side? I tried wiping it with accetone. Nothing. Didn't change at all. The boat is coated with System 3 Epoxy. Is there any way to fix this, short of sanding it down and re-coating it with epoxy.
    DinchyClouds1.jpgDinchyClouds2.jpgDinchyClouds3.jpg
    "Don't tell me that I can't. Tell me how I can!"
    Ike
    New Boatbuilders Home Page

  2. #2
    Join Date
    Jan 2003
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    New Zealand's Far North
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    Default Re: Epoxy Clouding, How to fix

    Given that the epoxy is well and truly cured, I think the reason will be different from what happens when fresh epoxy turns cloudy.
    Try sanding and polishing it out with 1000 grit sandpaper, and then a polish. I've seen a similar effect on an old car's paint after the cover has been removed.

    My thinking is that possibly the cover may have had water resting on it in those areas which magnified the sun's heat which caused the discolouring.
    There is nothing quite as permanent as a good temporary repair.

  3. #3
    Join Date
    Oct 2009
    Location
    South Puget Sound/summer Eastern carib./winter
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    16,118

    Default Re: Epoxy Clouding, How to fix

    That plywood looks like( in addition to being cloudy )it is sunburnt epoxied occoume.
    Sand her with 80 grit and coat her with Interlux 2000 then a paint of your choice.
    Maybe sand it all off .How is the inside?

  4. #4
    Join Date
    Oct 2005
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    Pacific Northwest
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    Default Re: Epoxy Clouding, How to fix

    The inside is pristine. Looks like it did when I built the boat 10 years ago. I completely re-coated the bottom and sides last summer. It's been covered since last October. If I had a shed or garage that's where it would be kept but no such luck since I live in my RV in an RV park. See. http://newboatbuilders.com/pages/Dinghy.html It's sitting on top of my 12 foot rowboat, on a trailer. Anyway, I suspect I'll have to lightly sand it and do it over. That is Occoume. Don't know about the sunburnt.
    "Don't tell me that I can't. Tell me how I can!"
    Ike
    New Boatbuilders Home Page

  5. #5
    Join Date
    Apr 2010
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    South Australia and Tasmania
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    18,061

    Default

    I'd leave it in fresh air and sunlight for a few days before attacking it.might just be some moisture in there

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  6. #6
    Join Date
    Oct 2005
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    Pacific Northwest
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    457

    Default Re: Epoxy Clouding, How to fix

    Thanks. That's what I plan to do.
    "Don't tell me that I can't. Tell me how I can!"
    Ike
    New Boatbuilders Home Page

  7. #7
    Join Date
    Mar 2005
    Location
    USA
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    289

    Default Re: Epoxy Clouding, How to fix

    Quote Originally Posted by Peter Eikenberry View Post
    The inside is pristine. Looks like it did when I built the boat 10 years ago. I completely re-coated the bottom and sides last summer. It's been covered since last October. If I had a shed or garage that's where it would be kept but no such luck since I live in my RV in an RV park. See. http://newboatbuilders.com/pages/Dinghy.html It's sitting on top of my 12 foot rowboat, on a trailer. Anyway, I suspect I'll have to lightly sand it and do it over. That is Occoume. Don't know about the sunburnt.
    What is your cover made from? The plastic tarps will still let through some of the suns UV rays.

  8. #8
    Join Date
    Oct 2005
    Location
    Pacific Northwest
    Posts
    457

    Default Re: Epoxy Clouding, How to fix

    It's a boat cover, some canvas material. But I suspect it trapped moisture under the cover. It's very damp here in the winter, typical Pacific Northwest.
    "Don't tell me that I can't. Tell me how I can!"
    Ike
    New Boatbuilders Home Page

  9. #9
    Join Date
    Aug 2017
    Location
    Melb, Vic, Aus
    Posts
    637

    Default Re: Epoxy Clouding, How to fix

    Maybe put some spacers under thee next time so the tarp can breathe

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