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What is a possible cause of poor adhesion of a new coat over a dry acrylic layer?

Answer and explanation

Correct answer: The surface had dust, grease, or loose material

The governing concept is surface preparation and mechanical adhesion. A new acrylic coat must contact a clean, dry, stable surface. Dust, grease, or loose particles form a separating film, so the fresh paint cannot bond properly and may peel or lift. Colour brightness, brush width, and the lightness of the new colour do not directly determine adhesion. Cleaning the surface and removing unstable material before repainting prevents the problem, making option D correct.

Related tags

Paint AdhesionSurface PreparationAcrylic PaintingLayeringPainting TechniquesAcrylic ColourArt EducationClass 9 Mcq

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