Allow sufficient drying time between coats as specified by the manufacturer; oil paints cure slowly, and rushing this process can trap solvents, leading to wrinkling or improper curing. Surface Preparation is Non-Negotiable Skipping surface preparation is the most common reason for failure when painting oil over latex.
Primer For Smooth Latex Under Oil
" Latex paint cures as water evaporates, leaving a slightly porous, rubbery surface that typically bonds well with other latex paints. Oil-based paints, however, cure through a chemical oxidation process, creating a hard, non-porous film.
Advantages and Ideal Use Cases Despite the extra preparation, using oil over latex offers distinct advantages that make the effort worthwhile. Oil-based paints provide an exceptionally hard, durable, and glossy finish that is highly resistant to moisture, scuffs, and abrasion.
Primer For Smooth Latex Under Oil
Lightly sanding the latex surface with fine-grit sandpaper (220-grit) is highly recommended. This hard film lacks the texture or "tooth" necessary for mechanical bonding with a smooth latex surface.
More About Oil based paint over latex
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