Simply rolling or brushing over this surface will result in a slick barrier that causes the new paint to strip away in sheets. The Preparation Process Successful application relies on a methodical approach to cleaning and repairing the substrate.
The Essential Role of Bonding Primer When Painting Oil Over Latex
Skipping this step almost guarantees that the topcoat will fail, regardless of how much skill is applied during the painting process. The surface must be completely dry and free of any contaminants before moving on to the priming stage.
Priming: The Non-Negotiable Step Using a bonding primer is not merely a recommendation; it is the bridge that ensures the oil paint adheres to the latex substrate. Glossy finishes are engineered to be highly resistant to moisture and dirt, which means they are exceptionally smooth and difficult for new paint to grip.
The Essential Role of a Bonding Primer When Painting Oil Over Latex
Because oil and water do not mix, the oil paint struggles to bond effectively with the slightly moist or chemically inert surface of the cured latex. Dust, dirt, and greasy residues act as barriers between the old and new paint, so a thorough cleaning with a TSP (trisodium phosphate) substitute or a dedicated degreaser is essential.
More About Can you paint over latex with oil based paint
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