Sanding silk paint is primarily done to prepare the surface for subsequent layers, such as a different type of paint like matt emulsion. It's not typically done to smooth the finish of the silk paint itself as a final step.
Preparing Silk Paint for Repainting
When you need to paint over a surface previously coated with silk paint, sanding is a crucial step to ensure proper adhesion of the new paint layer. This process is often referred to as 'giving the surface a key'.
According to one reference, the method involves:
- Selecting the Right Sandpaper: Use 120 grade sanding paper. It's important to use this specific grade or higher.
- Caution: Using anything lower than 120 grade can scratch the silk finish. These scratches can become visible under a new paint layer, especially in certain lighting conditions.
- Applying Light Pressure: Use a light rub over the silk painted surface. The goal is not to remove the paint entirely, but to create a slightly roughened surface that the new paint can grip onto.
- Cleaning the Surface: After sanding, dust off the rubbed down areas. Use a tack cloth or a microfiber cloth to effectively remove all sanding dust. This is vital for ensuring a clean surface ready for painting.
By following these steps, you successfully prepare the silk paint, giving it the necessary 'key' so that you are now ready to apply the next layer, such as matt emulsion.
Summary Table: Sanding Silk Paint for Prep
Here's a quick overview of the process:
| Step | Action | Tool/Material | Purpose | Important Note |
|---|---|---|---|---|
| 1. Sanding | Apply a light rub | 120 grade sandpaper | Create a 'key' for adhesion | Do NOT use < 120 grade (causes visible scratches) |
| 2. Cleaning | Thoroughly remove all dust | Tack or microfiber cloth | Ensure clean surface for new paint | Dust interferes with adhesion |
| 3. Preparation Complete | Surface is now ready for the next paint layer | N/A | Ready for applying matt emulsion or similar | N/A |
Remember, this method is specifically for preparing silk paint to be painted over, providing a suitable surface for adhesion rather than modifying the final silk finish itself.
