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The 5-hour clear coat blush that wrecked my 2017 F-150 in Des Moines
Back in April I sprayed a driver's side door on a 2017 F-150 and the clear coat came out flawless in the booth, but 5 hours later it blushed something awful with that milky haze. The humidity had spiked from 40% to 70% while the door sat in the sun before I wet sanded, and now the job needs a full repaint. Anyone else get burned by a late-day humidity jump like this, or is my booth's air dryer just a paperweight?
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miles_garcia22d ago
Honestly, Des Moines in April is a straight up coin flip on humidity, so I’m not buying the booth dryer blame. If you shot that door in the morning when the air was dry, then let it bake in the sun before the dew point climbed, that’s on the schedule, not the equipment. A 40 to 70 swing in five hours is brutal, but any decent painter knows to check the weather app before laying down clear, not after. You said it looked flawless right out of the booth, which means your mix and gun were fine, so the blush is just physics doing its thing. Repaint it, but next time park the car inside or wait for a dry stretch, cause that dryer won’t save you from mother nature.
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