Application and Drying Considerations When applying the latex paint over the primed surface, treat the project with the same care as any other painting job. Oil based paints cure through oxidation, creating a hard, non-porous surface that repels water.
Preparing Oil Surfaces Correctly for Latex Paint Application
Simply cleaning the surface is not enough; you need to ensure the smooth, high-gloss sheen is completely eliminated. Use high-quality brushes or rollers to ensure an even distribution and a smooth finish.
Because the slick, glossy nature of oil paint does not provide enough grip, the water-based topcoat will not bond correctly and will simply sit on top, ready to chip away. Understanding the Chemistry Behind the Layers The primary obstacle when covering oil based paint with latex paint is adhesion.
Preparing Oil Surfaces Properly for Latex Paint Application
Not all primers are created equal, and using a standard drywall primer will likely lead to failure. This process, known as deglossing, involves physically altering the surface to create a rough texture for the paint to grip onto.
More About Can you paint latex paint over oil based paint
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