Yes, you can use emulsion on gloss paint, but preparation is key.
How to Prepare Gloss Paint for Emulsion
Applying emulsion paint directly onto gloss paint is not recommended because the emulsion will not adhere properly to the smooth, non-porous surface of the gloss. This can lead to peeling and flaking. To successfully apply emulsion over gloss, you need to ensure proper adhesion. Here are two main approaches:
Method 1: Sanding
- Surface Preparation: The most common method involves thoroughly sanding the gloss surface.
- Creating a Key: Sanding creates a "key" or a slightly roughened surface that the emulsion can adhere to.
- How To: Use a fine to medium-grit sandpaper to achieve an even, matt surface.
- Clean Up: Remove all dust created by sanding before painting.
Method 2: Using a Primer (Zinsser BIN)
- Alternative Approach: A less labor-intensive method is to apply a coat of a high-adhesion primer such as Zinsser BIN.
- No Sanding Required: With Zinsser BIN, sanding the gloss paint is not necessary.
- Adhesion Promoter: This primer creates a suitable base for the emulsion paint to bond to.
- Application: Apply one even coat of Zinsser BIN to the gloss surface.
- Painting: Once the primer is dry, you can apply your chosen emulsion paint.
| Method | Prep Work | Time Required | Recommended For |
|---|---|---|---|
| Sanding | Yes | Medium | Most situations |
| Zinsser BIN | No sanding needed | Fast | When you want to avoid sanding |
Key Takeaways
- Proper Prep: Proper preparation is essential for emulsion paint to adhere properly to gloss paint.
- Surface Adhesion: Sanding or applying an adhesion-promoting primer are both effective ways to prepare the gloss surface.
- Avoiding Peeling: These steps prevent peeling and ensures long-lasting paintwork.
