A degreaser or a solution of mild detergent and water, followed by a clean water rinse, ensures a chemically neutral canvas. The Critical Step of Deglossing Before you can even think about opening your latex can, you must address the shiny surface of the oil paint.
Step-by-Step Latex on Oil Paint Preparation Guide
These primers are specifically formulated to chemically bond with oil-based substrates and provide a receptive surface for the latex topcoat. While a standard interior acrylic might work on a well-prepared wall, opting for a higher-performance product can save you time and effort.
Wiping away the resulting dust with a tack cloth is essential to remove any particles that could interfere with adhesion. Oil-based paints cure through an oxidation process, creating a hard, non-porous, and glossy finish that repels water.
Latex On Oil Paint Preparation Guide: Deglossing and Priming Steps
Because oil and water do not mix, applying latex directly over a slick, fully cured oil surface creates a barrier where the two layers essentially slide past one another rather than bonding. Skipping this step almost guarantees failure, regardless of how well you sanded.
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