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            DIY Message Boards  Hop To Forum Categories  Home Improvement  Hop To Forums  General Home Improvement    polyurethane fail?
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        polyurethane fail? Sign In/Join 
        posted
        I painted a bench with exterior gloss paint. Once it was dry my handyman then applied two coats of gloss polyurethane. The polyurethane became cloudy and dried that way. What went wrong and how do I fix it? It was hot outside, but it was all painted in the shade. Thanks.
         
        Posts: 20 | Registered: Jan 27, 2006Reply With QuoteReport This Post
        Picture of joecaption
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        #1 There was no need to use Poly over ext. paint.
        #2 You would have to use a marine grade poly for it to last more then a year because of the UV.
        #3 Most poly will fail long before an ext. paint will and need to be sanded off to refinish which most likely will scratch or remove the paint under it so you would be back to square one.
        And to answer your real question if he did this when there was high humidity, it was old poly, poly was not stirred and allowed to set long enough for the air bubbles to settle out, paint was not allowed to dry long enough it can cloud up.


        joecaption
         
        Posts: 17998 | Location: Hartfield VA | Registered: Jan 31, 2004Reply With QuoteReport This Post
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        Thanks, Joe. It's going to be used in a business and will have high usage which is why I used the polyurethane. Yes, there was high humidity which is unusual for our area. Yep, square one, I will paint over it and start again.
         
        Posts: 20 | Registered: Jan 27, 2006Reply With QuoteReport This Post
        Picture of joecaption
        posted Hide Post
        Painting over poly is a whole other topic.
        Going to have to sand it to rough it up and use an oil based bonding primer before painting.
        And it's never going to hold up as well painting paint over paint would have.


        joecaption
         
        Posts: 17998 | Location: Hartfield VA | Registered: Jan 31, 2004Reply With QuoteReport This Post
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        Ok, Joe. Thanks for the pointers.
         
        Posts: 20 | Registered: Jan 27, 2006Reply With QuoteReport This Post
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