Lightly sanding the surface with fine-grit sandpaper—usually 220 grit—will create microscopic scratches that act as an anchor for the latex paint. This rigid surface is excellent for sealing stains or preventing rust, but it provides a poor surface for new paint to grip onto.
Effective Deglossing Sanding Techniques for Oil Primer Surfaces
In these cases, incorporating a bonding agent is a highly recommended practice. This creates a powerful mechanical bond that significantly reduces the risk of adhesion failure, effectively locking the topcoat in place.
Patience between coats is key to building a durable and smooth finish that looks great for years. Understanding the Chemistry of Primers and Topcoats To determine the compatibility of these materials, it is essential to look beyond the generic labels of water-based and oil-based and understand how they cure.
Deglossing and Sanding Oil Primer for Superior Adhesion
Allow the agent to cure until it is touch-dry before applying the latex paint. A bonding agent can be rolled or brushed onto the sanded oil primer, allowed to become tacky, and then the latex paint is applied.
More About Can you paint latex over oil primer
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