Painting Construction Standards for Home Decoration
A) Transparent finish clear varnish. The quality of furniture depends on the painter.
Before each paint application, the site should be cleaned to avoid dust affecting the paint job.
After the decorative panels arrive at the construction site, their quality should be inspected. They should not have any damage, see-through areas, or noticeable color differences. If there are no quality issues, use sandpaper to remove stains and apply the first coat of primer following the wood grain.
After the doors, windows, and furniture are completed, remove handles, locks, hinges, and other hardware components. Cover glass and fireproof boards with paper tape to prevent paint contamination. Clean the dust and mortar from the surfaces of doors, windows, and furniture. Protect the corners of walls, and use a scraper to clean rust and glue marks. Pay special attention: nails exposed outside should be driven in.
Based on the depth of the patterns on the decorative panels and trim strips, adjust more than three different shades of pigments. Compare these with the colors of the panels and lines to fill gaps. After the filler dries, sand it clean with sandpaper (except for nail holes, the wooden surface should not have any residual primer traces). From a distance of 1 meter, nail holes should not be visible. Conduct a test before filling gaps.
Use 280-grit sandpaper to sand the surface clean, then apply the second coat of primer following the wood grain.
For nail holes that have been painted, check if the color matches the surrounding area. If there is too much color difference, use adjusted putty to correct the color, then sand with 360-grit sandpaper to prevent the second coat of topcoat from bubbling or wrinkling. The second coat of topcoat should be applied thicker and more concentrated.
After the second coat of topcoat is completely dry, sand it with sandpaper. Wipe it clean until it feels smooth to the touch, then apply the third coat of topcoat. Use a dedicated straight-angle tool for sealing wooden substrates.
The third coat of topcoat should be thinner, and the hand should be light. The requirement is for the paint surface to have no brush marks, no fuzz, and no flaws.
For different brands of paints, strictly follow the instructions, steps, and methods for careful construction to achieve a thick, smooth paint film with good tactile sensation.
Polyester paint requires 3-4 coats, while nitrocellulose paint requires at least 7 coats.
Remove the lock before painting, and fully protect the handles and hinges.
The quality of the paint job depends on the skill of the painter and the quality of the spray gun.
B) Applying colored paint
Use 210-grit sandpaper to sand off rust, adhesive residue, and burrs from the surface of wooden products, then apply a coat of transparent clear varnish to prevent yellowing after applying colored paint, especially white paint.
For colored paint, always use atomic gray as the base.
Apply atomic gray over large areas. After it dries, sand it with 280-grit sandpaper using a hard wooden block underneath (do not use foam blocks to avoid rounding the edges of furniture).
During the filling process, pay special attention to the seams of the lines and the edges of the frames. Ensure the surface is smooth and flat, with sharp edges, no chipping or corner loss, and use a straight-angle tool before applying the primer (otherwise, filling will not be possible later).
After applying the first coat of primer, sand again. Repeat this process two to three times, then wet-sand with 1000-grit water sandpaper.
For the final coat of topcoat, apply it thinly to ensure no brush marks, fuzz, or flaws remain.
Interior painting
Use 240-grit sandpaper to remove all adhesive residue, pen marks, and burrs, then apply the first coat of clear varnish.
Adjust the color and fill gaps. After the filler dries, sand it smooth with 240-grit sandpaper until it feels smooth, then apply the second coat of paint.
Sand with 360-grit sandpaper, then apply the third coat.