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Old 03-04-2013, 08:57 PM   #1
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dadstoy's Avatar

1982 28' Airstream 280
Redwood City , California
Join Date: Mar 2008
Posts: 2,083
Pin holes in paint

I'm painting some interior trim and I'm getting pin holes or craters where the paint isn't covering. What causes this? Its probably too cold and the humidity is probably too high, but that's what I have to work with. Any ideas/suggestions?

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Old 03-04-2013, 09:57 PM   #2
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1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
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My experience with this is that the pinholes are from tiny water droplets. If you are spraying paint, especially when it is cool or cold, the propellent is colder than the dew point of the air which causes tiny drops of water to become entrained in the spray. If you are brushing the paint on, my guess is that the surface is not dry enough.

My best shot, at any rate. You must work in higher temps and lower humidity, that is the only solution.
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Old 03-04-2013, 10:43 PM   #3
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Oregon City , Oregon
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Your problem could be oils or silicone on the surface your trying to paint. You might want to clean the area with wax and grease remover and maybe some warm soapy water. Then rinse thoroughly with clean water.
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Old 03-05-2013, 12:36 PM   #4
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Grayson , Georgia
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Yep, my guess is silicone or oils as well. The problem is called "fisheye" and comes from contaminants that repel the paint on contact. A good degreasing should fix the problem. You'll need to sand down the areas that you've sprayed and start over after you've degreased it. One more reason to not use silicone inside or out IMHO.
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