You must first clean the wall thoroughly to remove dust and grease, then lightly sand the surface with fine-grit sandpaper to break the seal. Oil-based formulas are inherently glossy and create a non-porous barrier, while water-based latex cures to a matte, porous surface.
Step By Step Oil Over Latex Process
Understanding the Chemistry The fundamental challenge when you paint oil over latex lies in adhesion. After sanding, a deglosser or liquid sander should be applied to chemically etch the glossy finish, ensuring the primer can bond securely.
" To combat this, the substrate must be altered chemically or mechanically to provide a grip for the oil to cling to. When working over latex, it is recommended to use a water-miscible oil paint rather than traditional linseed oil products.
Step By Step Oil Over Latex Process
You cannot simply roll or brush oil paint directly over a glossy latex surface and expect perfection. Latex paint forms a flexible, breathable film that absorbs moisture.
More About Can you paint oil over latex
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