Answer for Why is there a whitish streaked residue on our newly painted black door with semi-gloss black paint?

Probably what you are seeing is surfactant bleed. All latex and acrylic paints have surfactants and are a necessary part of the paints formula. Fluctuating temperatures and the presence of moisture (dew, rain or water droplets from washing the windows) are the primary cause of this problem to freshly applied paint.

Repainting the doors shouldn't be necessary, but you will need to wipe the affected area with warm water and a soft cloth. Do this 2-3 times. If the white streak(s) reappear wash the area with a mild soap and rinse well. Rinsing the affected area(s) could slightly alter their color as compared to the rest of the door. If this occurs wipe down the entire door.

If wiping down the door doesn't remove all of the surfactant bleed, the door must be primed and repainted. Wiping with water and a soft cloth usually takes care of the problem.

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