You can successfully paint over emulsion paint by preparing the surface properly.
Preparation is Key
Sanding the Existing Emulsion
- Start by lightly sanding the existing emulsion paint with 180 grit sandpaper. Don't press too hard, the goal is just to create a slightly textured surface for the new paint to adhere to.
- Remove all dust after sanding. This is very important as dust can interfere with the new paint's adhesion and lead to a poor finish. You can use a damp cloth or a tack cloth for this.
Undercoating (Optional but Recommended)
- Ideally, applying an oil-based undercoat is beneficial, especially if you're changing to a satin or gloss finish.
- The oil-based undercoat helps prevent peeling in the future, particularly if the area is subject to heat.
Painting the New Coat
Applying the Final Coat
- Once the undercoat (if used) is dry you can paint over the sanded and cleaned emulsion with your desired topcoat such as satin or gloss.
Step-by-Step Guide in a Table
| Step | Action | Why? |
|---|---|---|
| 1. Sanding | Use 180-grit sandpaper to lightly sand the existing emulsion. | Creates a textured surface for better paint adhesion. |
| 2. Dust Removal | Wipe all dust away with a damp cloth or tack cloth. | Ensures a smooth and clean surface for the new paint. |
| 3. Undercoat (Optional) | Apply an oil-based undercoat. | Helps prevent peeling, especially with heat and when switching to satin or gloss finishes. |
| 4. Final Coat | Apply your desired topcoat (e.g., satin or gloss). | To achieve your desired finish. |
By following these steps, you can successfully paint over emulsion paint and achieve a long-lasting and professional-looking result.
