Covering semi-gloss paint with flat paint is achievable, but requires careful preparation. Success hinges on proper surface preparation and the use of a bonding primer.
Preparing the Surface for a Smooth Finish
Before applying flat paint, you must adequately prepare the semi-gloss surface. This process ensures the new paint adheres properly and prevents peeling or unevenness. The key steps include:
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Cleaning: Begin by thoroughly cleaning the semi-gloss surface to remove any dirt, grease, or grime. Use a mild detergent and water, then rinse and allow to dry completely.
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Sanding: Next, sand the semi-gloss surface to lightly roughen it. This will provide better adhesion for the primer and flat paint. Use fine-grit sandpaper (around 220-grit) to avoid scratching the surface.
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Dust Removal: After sanding, remove all dust particles using a vacuum cleaner and/or a tack cloth. Thorough dust removal is crucial for optimal paint adhesion.
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Priming: Apply a high-quality bonding primer. This is a vital step, as it creates a uniform surface for the flat paint to adhere to. Choose a primer specifically designed for bonding to glossy surfaces. Allow the primer to dry completely according to the manufacturer's instructions.
After completing these steps, you can apply your chosen flat paint using standard painting techniques. Remember to apply thin, even coats and allow adequate drying time between coats.
Importance of Priming
The provided reference highlights the importance of priming: "You can put flat paint over semi-gloss, but it requires proper preparation and technique to ensure a smooth finish. Preparation steps include cleaning the surface, sanding down the sheen, removing dust particles with a vacuum cleaner or tack cloth, and priming with an appropriate bonding primer before painting." This emphasizes that priming isn't optional; it's crucial for a successful paint job. Without priming, the flat paint may not adhere properly, leading to peeling or an uneven finish.
