A high-quality bonding primer is specifically engineered to adhere to slick, low-porosity surfaces and then provide a grippy, porous surface for the oil paint. Oil paint requires a surface that it can physically grip and chemically bond to; bare or sealed latex provides neither.
Oil Paint Over Latex Primer Selection Guide for Flawless Adhesion
Executing the Oil Paint Application Once the primer is completely dry and sanded lightly with fine-grit paper, the stage is set for the oil paint. This mechanical abrasion creates the necessary micro-surface for the primer to lock into, significantly boosting the bond strength.
Use a natural bristle brush for trim and cutting in, and a high-quality short-nap roller for larger, flat surfaces to achieve an even finish. Multiple thin coats are always superior to one thick coat, allowing each layer to cure before the next is applied.
Selecting the Right Oil Paint Over Latex Primer for Superior Adhesion
The first step is to de-gloss the entire area by sanding with medium-grit paper (120-150 grit) until the surface loses its shine and develops a matte, toothy texture. Shellac-based primers, such as those containing Zinsser B-I-N, are the industry gold standard for this application.
More About Oil paint over latex
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