One. Is it necessary to apply a primer before painting elm wood furniture?
- Before painting elm wood furniture, it is necessary to apply a primer. After applying the polyester primer, apply the color-absorbing agent within 72 hours. The optimal time for application is immediately after the primer has dried, ensuring even absorption and uniform color. Allow one hour for the color-absorbing agent to dry, then wipe off any excess. If the color-absorbing agent is not completely absorbed or dried, apply a second coat. Finally, use a clear color-absorbing agent to wipe over the surface for a final finish.
Two. What should be used to apply a finish to elm wood furniture?
(1) Coating-based, closed system:
- Staining, surface finishing, revealing the base pattern of the panel, concealing the pores of the panel, transparent clear coat.
1、Use 360# sandpaper to trim edges and remove any rough spots, preparing the substrate to a smooth white finish. The surface should be finished by sanding along the grain of the panel, and it is strictly prohibited to sand across the grain.
2. Apply the primer coat, with a ratio of 1:0.5:1.6~2.0 (base: solvent: thinner). Ensure even application, no sagging, and no coarse particles. The application can proceed to the next step after 1 hour in summer and 3 hours in winter.
3、Apply the water-based atomic ash evenly and level it, and adjust the color according to the desired shade.
4. Use 360-grit sandpaper to smooth the surface, following the grain of the panel. It is strictly prohibited to sand horizontally against the grain. The surface should be free of burrs and dust spots, and any remaining dust should be thoroughly cleaned.
5. Apply a coat of stain-blocking primer using a wool brush. After applying the primer, evenly wipe it across the surface following the grain with a cloth, ensuring no drips or streaks remain. This process can be completed in 1 hour in summer and 3 hours in winter.
6. Apply PU primer coat: 1:0.5:0.6~0.8 (base: hardener: diluent). The coating should be uniform in thickness, rich, and free of particles and sagging.
7. Patching: Fill in needle holes, fill in shrinkage, and apply after the base coat has dried. In summer, use oil-based atomic putty within 2 hours, and the color must match the base coat. Other colors are strictly prohibited.
8. Sanding: Fully sand with 360 grit sandpaper, then use 600 grit sandpaper to smooth out any remaining scratches. The finish should be free of blemishes, sharp edges, pinholes, shiny spots, dust, and debris. Sand along the grain of the panel, and avoid sanding horizontally against the grain. Do not sand through the existing color coat.
9、Color Touch-up: After using a brush to repair and color the damaged surface, mix 1 kg of primer with 50-60g of color pigment (1:0.5:1.1-1.3, primer:pigment:diluent). Use a 1.2mm sprayer with moderate paint output and air pressure. Maintain a 45-degree angle between the sprayer and the surface.10、Sanding: Sand with 1000-1500 grit sandpaper to achieve smooth edges, no burrs, no pinholes, and no dust. Also, sand along the surface texture of the panel. Avoid sanding horizontally against the texture.
11. Apply a coat of paint with a ratio of 1:0.5:0.4～0.8 (binder: solid content: thinner). The paint film should have a tactile feel, without any graininess, sagging, or haziness.
(ii) Open-air coating application:
- Stain revealing, surface color correction, revealing the base pattern of the board material, revealing the pores of the board material, transparent clear coat.
1、Clean the white base with 360 grit sandpaper to remove edges, burrs, and other imperfections. The surface should be smoothed in the direction of the grain, and it is strictly prohibited to grind against the grain.
2. Apply the primer coat, with a ratio of 1:0.5:1.6-2 (binder:solvent:thinner), ensuring even thickness, no sagging, and no coarse particles. The next step can be performed after 1 hour in summer and 3 hours in winter.
3. Applying Primer: Mix water-based atomic primer with the desired color or white, and avoid mixing with other colors. Use to fill nail holes and repair gaps. Application time is 1 hour in summer and 4 hours in winter before proceeding to the next step.
4. Use 360 grit sandpaper to thoroughly abrade the surface, following the panel's texture. It is strictly prohibited to abrade in a crosswise direction. The surface must be free of burrs, dust, and residual particles.
5. Cleaning: After applying the cleaning agent with a wool brush, use a cloth to evenly and thoroughly wipe the surface in the direction of the grain, ensuring no streaks or residue remain. The process can be completed in 1 hour during summer and 3 hours during winter before proceeding to the next step.
6. Apply a primer coat. The PU primer mix ratio should be 1:0.5:1.4-1.7 (base: solid: solvent). The coating should be uniform in thickness, have a tactile feel, and free from defects such as peeling, detachment, granules, and sagging.
7. Use 600-grit sandpaper to smooth the surface, following the grain pattern of the panel. It is strictly prohibited to sand horizontally against the grain. The surface should be free of burrs and dust marks, and any remaining dust should be thoroughly cleaned. Sanding should not damage or discolor the surface.
8. Color Correction: After cleaning and repairing the damaged substrate with a brush, apply color-matching putty powder. The ratio is 1KG of base coat paint + 60-70G of color-matching putty powder in a 1:0.5:1.6-1.8 (base: hardener: thinner) ratio. Use a 1.2mm sprayer to apply the color-matching putty powder. The paint output and air pressure should not be excessive. Maintain a 45-degree angle between the sprayer and the substrate.
9. Sanding: Sand with 1000-1500 grit sandpaper until smooth, ensuring clean edges, no burrs, and no dust. Also, ensure sanding is performed along the grain. It is strictly prohibited to sand across the grain.
10、 Spray paint, with a ratio of 1:0.5:1-1.5 (binder: solid: thinner), requiring a smooth finish, with a tactile feel, and free from defects such as graininess, sagging, and hazing.