Why objects stick to finish - Woodworking Talk - Woodworkers Forum
 
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post #1 of 6 Old 05-25-2015, 06:32 PM Thread Starter
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Unhappy Why objects stick to finish

I Made a bookcase of pine and another of popolar plywood I painted it then put on two coats of semi gloss polly. everything was completly dri. now weeks later objects that are put on the shelves stick. even mounths later items stick when I try to move them. Why does this happen. And how can I fix this problem.I am going to make another bookcase I dont want to repeat my mistakes.
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post #2 of 6 Old 05-25-2015, 06:56 PM
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Did you paint it with laytex or oil paint?

Don
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post #3 of 6 Old 05-25-2015, 08:14 PM
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Usually when that happens it is because you put on too many coats too fast before the individual coats were dry enough. It could also be due to the product you used for the clear coat. Some waterborne finishes seem to never dry. Personally I don't care for putting a clear coat over paint. I would have used a semi-gloss paint and not put anything over the top. If it was an oil based poly you used over the top eventually it will yellow altering the color of the paint.

The only thing you can do other than stripping it off and starting over at this point is to wait and see if the finish will fully cure. Anything more you could put on it would only add to the problem.
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post #4 of 6 Old 05-26-2015, 11:43 AM
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What you are experiencing is called "paint blocking". Google "paint blocking for a complete explanation of the problem. Basically, its because a "latex" paint is used instead of using a waterborne "acrylic" paint.

Howie..........
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post #5 of 6 Old 06-04-2015, 02:09 PM
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HowardAcheson, you read my minds! Did you solve your problem, Raydawg? Once I faced this problem too but thanks of google everything became perfect
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post #6 of 6 Old 06-04-2015, 11:05 PM
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Quote:
Originally Posted by raydawg View Post
I Made a bookcase of pine and another of popolar plywood I painted it then put on two coats of semi gloss polly. everything was completly dri. now weeks later objects that are put on the shelves stick. even mounths later items stick when I try to move them. Why does this happen. And how can I fix this problem.I am going to make another bookcase I dont want to repeat my mistakes.
Only time will fix your problem. It's called blocking. If you are going to use poly try using Sherwin Williams poly. Once what you have dries completely you can sand the damage out from stuff sticking to it and apply a coat of Sherwin Williams poly. It should be dry enough in about four days where only heavy items might stick. Some brands just take forever to fully cure. You should be warned that any oil based poly has an initial yellowing to it and will continue to yellow as it ages. This yellowing will affect the color. Personally I don't like putting a clear coat over paint other than automotive paint. If you are going to do it I would recommend using a water based polyurethane. It will be clear and will remain clear without the yellowing.
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