Chloe Zhang
Painting plastic door trim can be a simple and quick process with the right products. It is important to note that the best paint for plastic trim may differ from the paint used on the door itself, especially if the door is made from a different material. Before painting, the door should be cleaned thoroughly, and then sanded to allow the paint to adhere. The next step is to apply a suitable primer, which is key to ensuring the paint sticks to the plastic trim. Once the primer is dry, paint can be applied using a paintbrush or spray paint.
| Characteristics | Values |
|---|---|
| Paint type | Acrylic latex paint |
| Paint brand | Krylon, Sherwin Williams |
| Primer type | Oil-based primer, Aqua Lock primer, XIM plastic and vinyl primer, Bonding primer |
| Paintbrush type | Polyester paintbrush |
| Paintbrush size | Narrower than what you would need for the door |
| Number of paint coats | 2 |
| Drying time | 2 hours |
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What You'll Learn
Sanding and cleaning the plastic trim
Painting plastic trim on doors requires the right products and preparation. Sanding and cleaning the plastic trim before painting are crucial steps to ensure the paint adheres well and the finish is smooth and professional. Here is a step-by-step guide:
Sanding the Plastic Trim:
- Start by scuff-sanding the plastic trim with fine-grit sandpaper. Use 150-grit to 220-grit sandpaper, or a red "med-fine" scotch pad. Sanding the trim creates a rough profile for the paint to adhere to, improving the durability of the paint job.
- If there are heavy globs of old paint or other imperfections, use coarser-grit sandpaper, such as 80- to 120-grit, to smooth them out.
- If the trim has glossy surfaces, it is essential to scuff-sand these areas to create a gloss-free base for the paint.
- After sanding, use a clean cloth or a soft brush to wipe away the sanding dust from the trim.
Cleaning the Plastic Trim:
- Clean the sanded trim with a grease and wax remover to ensure the surface is free of any grease, dirt, or residue.
- Wash the trim with a non-soapy detergent or a mild solution, such as diluted dish soap or a TSP (trisodium phosphate) solution. Avoid using a cloth rag, as it may shine or dull the surface. Instead, use a soft cloth or sponge and gentle, up-and-down strokes, washing from the bottom upwards.
- Rinse the trim thoroughly with clean water or a vinegar-water solution to remove any detergent residue.
- If there are stubborn stains, such as marker, ink, or crayon marks, use a specialty cleaner to remove them. Otherwise, they may bleed through the paint.
- Allow the trim to dry completely before proceeding to the next step, which is usually priming the surface.
Remember to wear protective gear during the sanding and cleaning process, such as a dust mask, respirator, and gloves, to safeguard against dust inhalation and chemical exposure.
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Using painter's tape to protect the door
Painting a door with plastic trim can be a simple and quick process with the right products and preparation. Using painter's tape is a good way to protect the door and its fixtures while you paint.
Firstly, it is important to clean the door thoroughly. Use a cloth and water, or a diluted mixture of warm water and dish soap, to wipe down the door and trim. This will ensure the paint adheres properly. You can then use painter's tape to cover any areas you want to protect, such as windows, handles, and hinges. When taping door handles, it is recommended to use plastic wrap or a plastic bag secured with an elastic band and tape, as this will create a tighter seal. For hinges, cover the entire area with tape and smooth the edges with your finger. Then, use a knife to cut the tape around the edge of the hinge.
When you have finished painting, remove the tape while the paint is still wet to prevent any peeling. You can score the edge of the tape with a utility knife before removing it to help prevent this.
While painter's tape is a popular method for protecting doors during painting, it is not always reliable, especially for curved or uneven surfaces like doorknobs. In these cases, it may be best to remove the fixture before painting.
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Choosing the right primer
First, determine whether you need to prime at all. If you are working with a previously painted surface that is in good condition, priming may not be necessary. However, if the surface is bare and has not been previously painted or coated, primer is highly recommended. Additionally, if you are making a significant colour change, a primer can help you achieve the desired colour more easily.
Next, consider the type of coating on the surface you will be painting. To identify whether the existing paint is acrylic or alkyd-based, rub a cotton ball dipped in 70% isopropyl alcohol on the surface. If the paint comes off, it is acrylic-based; if it doesn't, it's alkyd-based. Knowing the type of coating will help you select the best primer for your project.
When choosing a primer for plastic trim, look for one that is specifically designed for use on plastic surfaces. Some primers, like Benjamin Moore's Aqua Lock primer, are suitable for both metal doors and plastic trim. Oil-based primers, such as Killz oil, are also recommended for plastic trim as they provide a strong base for the paint to adhere to. Additionally, consider using a plastic-safe spray primer, especially if you are painting window grids or snap-in grids, as it can make the process easier and help you achieve a smooth finish.
The type of top coat you plan to use should also influence your primer selection. Most acrylic and oil-based primers are versatile and can be used with either acrylic or oil-based topcoats. However, if you are using an acrylic finish over an existing oil-based topcoat, it is recommended to use a bonding primer or prepare the surface adequately. Benjamin Moore's Fresh Start primers offer superior adhesion and are suitable for various substrates, including wood, laminate, drywall, plaster, and most non-ferrous metals.
Finally, follow the manufacturer's instructions for applying the primer. Typically, one coat of primer is sufficient, and it should be allowed to dry completely before proceeding with the paint. Using the right-size paintbrush and long, even strokes will help you achieve a smooth finish.
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Using the right paintbrush
Painting plastic trim on doors can be a simple and quick process with the right products and tools. After cleaning the trim, applying primer, and choosing the right paint, it is important to use the right paintbrush for a smooth and flawless finish.
Firstly, it is important to select a paintbrush that is the right size for door trim. Door trim paintbrushes tend to be narrower than those used for painting the door itself. A 2- to 3-inch paintbrush is recommended for applying primer and paint to the plastic door trim.
The type of paintbrush bristles is also crucial. For example, a polyester paintbrush is recommended for applying latex primer and paint to exterior plastic door trim. Using a nylon brush on plastic door trim can result in brush marks and an uneven finish.
When painting, it is important to use long, even strokes with gentle pressure. This technique ensures a smooth and consistent finish. It is also advisable to allow ample drying time between coats, typically about two hours.
Additionally, it is worth noting that some sources recommend sanding the plastic door trim before priming and painting. Sanding creates a rough surface that promotes better adhesion for the primer and paint, resulting in a more durable finish. However, it is crucial to ensure that the trim is thoroughly cleaned after sanding to remove any dust or debris.
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Allowing adequate drying time
When painting plastic trim on doors, it is crucial to allow each coat of paint to dry adequately before moving on to the next step. The drying time will vary depending on the type of paint used, the application method, and environmental factors such as temperature, humidity, and ventilation.
For example, latex paint typically requires about four hours of drying time before applying a second coat, while acrylic paint dries faster and is usually ready for a second coat after two hours. Oil-based paints have a much longer drying time, often needing up to eight hours before being dry to the touch and a full 24 hours before applying another coat.
Quick-drying paint formulas can significantly reduce drying time. Some modern paints are designed to be dry to the touch in as little as 15 minutes and fully dry within four hours. Spray paints, including general-purpose spray paint, typically require two to four hours of drying time before the next coat and about 24 hours to fully dry.
To speed up the drying process, especially for water-based paints, increase airflow to the room. Open windows and use a fan to enhance ventilation. This not only helps the paint dry faster but also ensures a healthy painting environment.
It is important to remember that even if the paint feels dry to the touch, it may not be fully cured. Follow the paint manufacturer's instructions for the most accurate drying times, and when in doubt, give your paint extra time to cure. This patience will ensure a smooth, even finish without drips or imperfections.
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Frequently asked questions
Painting plastic trim on a door requires some preparation. First, clean the door and trim, removing any dirt or grease. Then, use painter's tape to protect the areas you don't want to paint. Next, sand the trim to create a surface that the paint can adhere to. After sanding, wipe away any dust, and apply a coat of primer compatible with plastic. Once the primer is dry, you can apply the paint. Use a high-quality exterior acrylic latex paint with a polyester paintbrush. Paint with long strokes, applying gentle pressure, and allow the trim to dry for at least two hours.
It is recommended to use a high-quality exterior acrylic latex paint for painting plastic trim on doors. Look for paints specifically designed for plastic, such as Krylon's Fusion for Plastic spray paint. Avoid using dark colours, as they may cause the trim to warp or shrink due to sunlight exposure.
Yes, you can spray paint plastic trim on a door. Krylon offers a range of spray paints specifically designed for plastic refinishing. However, be mindful of the additional preparation work required when spray painting. Ensure you thoroughly clean and sand the trim, and use painter's tape to protect surrounding areas.
