Omar Khalid
Painting plastic can be a challenge, but with the right preparation, you can achieve a smooth, professional finish. From furniture to décor, toys, and containers, there are plenty of plastic items that can be given a new lease of life with a simple coat of paint. In this guide, we'll cover everything you need to know about painting plastic, from the best paints to use to essential preparation techniques, so you can achieve long-lasting results.
| Characteristics | Values |
|---|---|
| Plastic items suitable for painting | Furniture, figurines, toys, containers, décor items, picture frames, flower pots, holiday ornaments, plastic gelato containers, etc. |
| Items not suitable for painting | Plastic/laminate floors, bathtubs/shower stalls, counters, shower walls |
| Surface preparation | Clean the item with mild dish soap and warm water. Remove mildew with a 3:1 water and bleach solution if necessary. Rinse and let dry. Lightly sand the surface with fine-grit sandpaper (180-220 grit) to create a rougher, matte surface. Wipe down with mineral spirits or isopropyl alcohol. |
| Paint type | Spray paint specifically designed for plastic, such as Rust-Oleum spray cans, Krylon Fusion, or Krylon's COLORmaxx. Alternatively, use acrylic, enamel, or brush-on paint. |
| Paint application | Hold the can 8-12 inches away from the plastic, tilted at a 45-degree angle. Spray lightly across the surface, moving forward, not backward, to prevent overspray. Apply light coats and let each coat dry completely before adding another. |
| Additional tips | Work in a well-ventilated area on a disposable surface like cardboard. Ensure the temperature is between 50-90°F to prevent bubbling or running. Use a primer designed for plastic to improve paint adhesion and longevity. |
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What You'll Learn
Choosing the right paint
Painting plastic can be a tricky endeavour. Plastic is not a porous material, so paint has little to stick to. However, with the right preparation, you can paint plastic successfully.
The first step is to choose the right paint. The best paint for plastic is usually a spray-on variety, specifically one designated for use on plastic surfaces. Spray paint offers light and even coverage in a unique formula that adheres to plastic's ultra-smooth exterior. You can also use brush-on paint, but you will not get as nice a finish as you would with spray paint. If you are using a spray paint designed for plastic, you can skip the priming step. However, if you are using regular spray paint, use a plastic primer spray first. You can also use an auto primer, as regular primer doesn't always bond well with plastic.
There are paints specifically designed to adhere to plastic, such as Rust-Oleum spray cans and Krylon Fusion. There are also plastic-friendly multisurface paints that may be appropriate for wrought iron, ceramic, metal, glass, and vinyl. Some brands offer a range of colours, as well as metallic options for plastic.
When spray painting, it is important to work in a well-ventilated area, but with minimal air movement to prevent dust and debris from collecting on the surface while drying. The ideal air temperature is between 50 and 90 degrees, to help with adhesion and prevent bubbling or running. Hold the can between 8 and 12 inches away from the plastic, with the can tilted at about a 45-degree angle. Spray lightly across the surface, moving forward, not backward, to prevent spray dust.
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Preparing the work area
Preparing your workspace is a crucial step in ensuring the success of your painting project. Here is a step-by-step guide to help you prepare your work area for painting plastic:
Choose a Well-Ventilated Work Area:
Select a work area that is well-ventilated to avoid inhaling paint fumes. Working outdoors on a dry day or under a patio awning is ideal. If working indoors, ensure proper ventilation by opening windows or doors. Remember to keep the area protected from dust and debris, as these can settle on the paint surface during drying.
Protect Your Work Area:
Use old cardboard or newspapers to cover your work surface. Paint tends to soak into cardboard and can smear on sheet plastic, so cardboard is a better option. This will catch any paint drips or overspray and make cleanup easier.
Gather Your Supplies:
Before you begin, ensure you have all the necessary supplies within reach. This includes your chosen paint, primer, sandpaper, cleaning materials, and any protective gear such as gloves and a respirator. Having everything ready will make your painting process more efficient and help you avoid interruptions.
Prepare a Cleaning Station:
Since cleaning the plastic surface before painting is essential, set up a separate area for this step. You will need a bucket filled with warm water and a mild dish soap solution. Have clean rags or sponges ready for scrubbing and rinsing the item. If using mineral spirits or isopropyl alcohol for the final wipe, ensure you have a separate container and rags for this step, following proper disposal guidelines for flammable materials.
Create a Sanding Station:
Lightly sanding the plastic surface is crucial for paint adhesion. Set up a designated area for sanding, where you can lay out your fine-grit sandpaper (180 to 220-grit) and lightly sand the entire surface in a circular motion. Remember to wear protective gear, such as a face mask, to avoid inhaling plastic dust during the sanding process.
By following these steps, you will have a well-prepared work area that is ready for the painting process. Remember to take your time, work in a well-ventilated space, and follow all safety guidelines when working with paints and chemicals.
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Cleaning the plastic surface
Painting plastic is a great way to give new life to old items, but it can be tricky. Plastic is not a porous surface, so the paint has little to stick to. However, with the right preparation, you can paint plastic successfully.
Firstly, set up your work area. It's important to protect the area you are working in as spray paint can carry. Work on old cardboard rather than sheet plastic, as paint smears on sheet plastic. Ensure you are working in a well-ventilated space, keeping away from any heat sources, and do not eat or drink in the area.
Next, give the plastic a clean. Fill a bucket or bowl with warm water and a mild dish soap. Scrub the plastic with a non-scratch sponge or a rag, or a scrubbing brush for textured surfaces. Rinse the plastic with cool, clean water, ensuring that all suds are removed.
If your plastic has set-in stains, pour rubbing alcohol onto the stain and let it sit for 10-20 minutes before scrubbing it away. Rinse the item again and let it dry completely for at least an hour.
To help the paint stick better, you can scuff-sand the surface with fine-grit sandpaper (180-300 grit). This will create a rougher surface for the paint to cling to. Be careful not to sand too vigorously, as this may create enough friction to melt the plastic. Finally, wipe the surface with a clean rag and mineral spirits or isopropyl alcohol to remove any remaining dust or oils.
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Sanding the plastic surface
Sanding is an essential step in preparing plastic for painting. It is a crucial step because paint adheres far better to rougher, matte surfaces than to glossy plastics. Since most plastic is glossy, sanding helps create a surface that the paint can grip onto.
To sand the plastic surface, you will need sandpaper. For plastic, it is best to use fine-grit sandpaper, such as 180- to 220-grit sandpaper. Fine sandpaper will prevent you from accidentally marring the surface of the plastic. If you are sanding a large area, you may want to use a random orbital sander. However, if you are sanding by hand, be sure to avoid vigorously sanding the plastic, as this may create enough friction to melt the plastic. Instead, use light to medium pressure to sand down the entire surface. If the plastic has curved surfaces or small crevices, it may be easier to use sandpaper instead of a sanding block.
When sanding, use a circular motion to buff the plastic surface. You can spray water on the sandpaper or use fresh sandpaper to prevent the plastic from being scratched if it dries out. Ensure that the sandpaper is always moist to the touch. If you want the best results, sand the surface when it is wet.
After sanding, the plastic surface will be covered in fine plastic dust. To remove this dust, wipe the surface with a rag soaked in mineral spirits or isopropyl alcohol. This step is crucial, as it will ensure that the paint adheres smoothly to the plastic surface.
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Spray-painting the plastic
Spray-painting is an effective, low-cost way to transform plastic items. It is considerably easier than hand-painting but it does take a little practice to perfect your technique. Adequate preparation is imperative, along with taking time to carefully spray evenly.
Firstly, set up a work area that's protected from other areas as spray paint overspray tends to carry. Work on old cardboard rather than on sheet plastic. Paint soaks into the cardboard but tends to smear on sheet plastic. When painting plastic and when using mineral spirits, be sure to work in a ventilated space, avoid breathing in the vapours, keep away from any heat source, and do not eat or drink in the area.
Before you try to paint on plastic, lightly buff the plastic surface with 220 to 300-grit sandpaper, using a circular motion as you sand. This will allow the paint to stick to the plastic better. Wipe down the plastic surface with alcohol to remove any oils that might prevent the paint from sticking, then apply a coat of primer. Choose acrylic, enamel, or spray paint, then apply the paint to the plastic surface in light coats, allowing each coat to completely dry before adding another one.
When spraying furniture, paint the bottom. Then, turn the chair upright and paint in the order shown above. Applying paint in this order ensures you get full coverage and eliminates drips. Apply the paint in light coats and repeat the process, completing one side and then the other. Let this coat dry completely before applying the next one.
Hold the can between 8 and 12 inches away from the plastic, with the can tilted at about a 45-degree angle. Spray lightly across the surface. Do not aim for total colour coverage at this point, as that will usually lead to drips. Let the plastic dry for at least two hours in a warm, dry environment. The paint should feel solid and dry to the touch, not tacky. If there are a few dried-on drips and drops, you can sand them down flat. For this, the paint has to be 100% dry and hard. Otherwise, you might end up with smeared paint that is difficult to remove.
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Frequently asked questions
Spray paint is the easiest type of paint to use on plastic. It is important to use a spray paint that is specifically intended for plastic, as general-purpose spray paints won't give you long-lasting results.
First, clean the plastic surface with soapy water or a mix of water and bleach if there is mildew. Then, sand the surface with fine-grit sandpaper (180 to 220-grit) to create a rougher surface for the paint to adhere to. Finally, wipe the surface with alcohol to remove any oils.
Apply the paint in light coats and let each coat dry completely before adding another one. Spray in a forward direction, holding the can between 8 and 12 inches away from the plastic, with the can tilted at about a 45-degree angle.
If you are using a spray paint specifically designed for plastic, you can skip the priming step. If you are using regular spray paint, it is recommended to use a plastic primer spray first.
You can paint a variety of plastic items, including furniture, decor items, toys, containers, and picture frames. However, some plastic surfaces are not suitable for painting, such as plastic/laminate floors, bathtubs/shower stalls, and counters.
