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Old 05-22-2019, 11:21 AM
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Painting BC/CC when it is raining outside?

I've got a paint booth constructed inside my attached garage. The booth has ventilation and filters. I usually paint with the garage doors cracked about a foot.

I've got everything planned to paint BC/CC this weekend but there is rain in the forecast. What should I do? Is there anything I can do to help mitigate the issues?

Is there a particular humidity in the paint booth I should shoot for?

I have a propane heater that I could use to dry the air in the garage. Should I use that?



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Old 05-22-2019, 11:28 AM
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I always like painting when the ground is wet. Keeps down a lot of dirt that floats in the air. Just watch out for wind gusts!
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Old 05-22-2019, 03:30 PM
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I've never had an issue with quality paint. Some cheaper clears when sprayed in very high humidity conditions can pick up moisture and look milky on the car.

If it's raining, the air coming in will be cleaner and bugs tend to disappear.
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Old 05-27-2019, 12:03 PM
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Unlike laquer, a good quality urethane is not affected much by moisture in the air, (rainy day) as long as there is no condensation on the surface to be painted, or in the air hoses.
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Old 05-28-2019, 04:42 PM
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LOL! My truck was painted in the middle of a downpour! Back in 2000! Used DuPont Nason. Not a single bug or dust speck in it! First time that's happened...

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Old 05-29-2019, 05:32 AM
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The propane heater if unvented will add moisture to the air. Just be sure to do the entire car under the same conditions, as color can change slightly with different ambient air variables.
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Old 07-21-2019, 06:40 PM
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I had something happen today for the very first time. Urethane Blush! The relative humidity was around 99%, no condensation, but it most certianly did blush. I almost thought the paint store gave me laquer. :yikes: 89 degrees, and I hadda put the heat to it. Oh well, it turned out just fine. I thought it strange though, as I'd not experienced it before.
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