Quck answer
To seal painted wood, follow these steps:
1. Clean the surface: Remove any dirt or dust from the wood using a damp cloth.
2. Sand the wood: Lightly sand the painted surface to create a smooth texture.
3. Choose the right sealer: Select a sealer that is suitable for painted wood, such as polyurethane or acrylic sealer.
4. Apply the sealer: Use a brush or roller to evenly apply the sealer to the painted surface. Follow the manufacturer’s instructions for drying time and number of coats.
5. Allow drying: Let the sealer dry completely before using or applying additional coats.
6. Optional: If desired, lightly sand between coats for a smoother finish.
7. Enjoy the sealed painted wood: Once dry, your painted wood is sealed and protected.
Shielding painted wood is crucial for preserving furniture and decorative pieces, especially those that are frequently used, such as tables, desks, and kitchen chairs. In addition to preventing paint from chipping and peeling, a sealant makes it easy to clean up spills and marks, and adds depth and shine that gives the piece a polished appearance. The first step in protecting painted wood is selecting the appropriate sealant.
Types of Sealants
There are many sealants available on the market, some of which can be used for both bare and painted wood. The following are sealants that are suitable for use over painted wood:
Polyurethane is a synthetic, oil-based varnish that creates a highly durable and protective coating on painted and bare wood surfaces. It comes in liquid forms that can be applied with a brush or spray can. Due to the emission of potentially toxic volatile organic compounds, or VOCs, during application, it should be used outside or in a well-ventilated area. Paint thinner or mineral spirits are required for cleanup. It can’t be removed through stripping, so if you want to refinish a piece sealed with polyurethane, you must sand and scrape it off.
Polycrylic is a water-based finish coat that can be applied with a brush, has little odor, and can be cleaned up easily with water. It is durable, although not as much as polyurethane. Many people prefer polycrylic, especially for children’s furniture, because it is low-VOC. Polycrylic appears white or milky when wet, but it becomes clear when dry.
Paste wax is a wax that is dissolved in solvent. The wax can be a natural substance like beeswax or carnauba. The product can be applied with a brush or cloth, and excess wax can be wiped away. After it has dried, it should be polished to reveal its shine. Wax finishes may be clear or colored for an antique appearance and are most suitable for use over chalk or milk paint. Wax can also be applied over polyurethane for a richer appearance and softer feel. Wax finish is not especially durable, so it is recommended that it be reapplied at least once a year. Waxed furniture should be kept away from high heat or direct sunlight, as the wax can soften and become sticky or melted.
Decoupage medium can be used for small painted wood projects, such as decorative plaques, trinket boxes, or picture frames. Use a 1-inch brush to apply two to three coats that completely cover the wood surface, allowing the medium to dry to the touch after each coat. Sanding between coats is not necessary. Allow the medium to dry for 24 hours after the final coat.
Paint-and-sealer combination products have recently appeared on the market. The sealer is incorporated into the paint mixture, eliminating the need for additional topcoats. Follow the product instructions for preparation and application. These products are effective for painting furniture white or light colors because they are less likely to discolor. Some sealants, such as polyurethane, may turn yellow over time, causing noticeable discoloration on white paint.
Applying a Brush-on Sealant
Each product has specific instructions from the manufacturer, so make sure to read the label before starting. The following are general guidelines for applying polycrylic or polyurethane sealants.
First Step
Ensure that the last layer of paint is fully dry. Use 220- to 320-grit sandpaper to lightly sand it, applying just enough pressure to smooth out any rough patches. Use a tack cloth to remove any sanding dust from the surface.
Second Step
Take a clean paintbrush and dip it into the sealant can. Gently stir the sealant if necessary, but avoid vigorous stirring or shaking as this may create bubbles in the liquid. Tap off any excess sealant from the edge of the can.
Third Step
Using the paintbrush, apply the sealant evenly from edge to edge in one direction. This will create a smooth finish once the sealant is dry. If you notice any drips or bubbles, use the edge of the brush to smooth them out while the coat is still wet. Let the sealant dry for one to two hours or as per the product instructions.
Fourth Step
Lightly sand the dried coat with 220- to 320-grit sandpaper. Use a tack cloth to remove any sanding dust.
Fifth Step
Apply the next coat of sealant. Let it dry, sand it, and repeat the process for one to three additional coats of sealant. There is no need to sand after the final coat. Allow the finished piece to stand overnight or in accordance with the product instructions before using it.