Chloe Zhang
Painting an RC car body can be a challenging task, especially for beginners. It requires careful preparation, including choosing the right paint and ensuring proper ventilation. The most suitable paint for RC car bodies is polycarbonate paint, specifically designed for polycarbonate or Lexan surfaces. Before painting, it is crucial to clean the body with soap and water to ensure paint adhesion. Additionally, taping off areas that should not be painted and using masking techniques for creating patterns and shapes is essential. When painting, it is best to start with darker colours and proceed to lighter shades, allowing sufficient drying time between coats.
| Characteristics | Values |
|---|---|
| Paint type | Polycarbonate paint, Lexan paint, or polystyrene paint |
| Paint brand | TAMIYA, Duratrax Polycarb Spray, Proline RC Body Paint |
| Paint application | Spray can, airbrush, or spray gun |
| Paint finish | Flat/matte |
| Paint colours | Dark colours first, then light colours |
| Paint coats | Thin coats, multiple coats for lighter colours |
| Paint drying time | Longer drying time between coats is better |
| Paint additives | Avoid anything that "speeds" up dry times |
| Paint temperature | 90°F |
| Paint protection | Clear sealant |
| Paint preparation | Wash with water and soap, grease removal, cardboard testing |
| Paint masking | Tape, liquid mask, window masks |
| Paint design | Simple, larger designs for beginners |
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What You'll Learn
Choosing the right paint
Paint Type and Compatibility
The type of paint you choose is critical to the success of your RC car body painting project. The most common type of paint used for RC car bodies is enamel or acrylic paint. These types of paint bond well with a variety of materials, including hard plastic, Lexan (polycarbonate), metal, fiberglass, and carbon fiber. Lexan, a polycarbonate plastic, is widely used for RC car bodies due to its toughness and impact resistance. Therefore, it is essential to choose paints compatible with Lexan/polycarbonate, such as the Testors Model Masters brand and other Testors acrylic and enamel paints. Using the wrong type of paint on Lexan will likely result in cracking and flaking.
Application Method
You can apply paint to your RC car body in several ways, including brushing, airbrushing, or spraying from a can. Each method has its advantages and considerations. Brushing is typically reserved for detail work, such as pin-striping or lettering, as it offers more precision. Spray cans, on the other hand, are convenient and suitable for covering large areas quickly and easily. Airbrushing is a versatile option that allows for both large-area application and detail work, resulting in a high-gloss finish prized by RC enthusiasts.
Paint Colour and Design Complexity
When choosing paint colours, it is advisable to start with darker colours, as they provide better coverage. Painting from dark to light is generally recommended. Additionally, consider the complexity of your design. If you're a beginner, opt for simpler designs, as intricate patterns may require techniques like liquid masking or taping to achieve clean edges and prevent paint from seeping into unwanted areas.
Surface Preparation
Before painting, ensure the RC car body surface is clean and free of any residue, grease, or dirt. Wash the body with non-abrasive dish soap and water, and dry it thoroughly with a soft, lint-free cloth or towel. Proper surface preparation will help the paint adhere better and result in smoother paint coats.
Primer and Top Coat
Consider using a primer, especially if you plan to paint light colours over dark plastic parts. A primer will help create a uniform base and improve the adhesion of subsequent paint layers. Additionally, a clear top coat can be applied to protect the paint job and add a glossy sheen to your vehicle.
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Preparation
Firstly, choose a suitable location for painting. It is best to work outdoors or in a room with good ventilation to avoid inhaling paint fumes. Take your time and ensure you have enough space to work comfortably.
Before you begin painting, it is important to clean the RC car body to remove any dirt, grease, or debris. Use a soft sponge or cloth with a mild detergent or dish soap, and thoroughly scrub the surface to be painted. Rinse the body with clean water and allow it to dry completely before moving on to the next step.
If your RC car body does not have an overspray film, you can create a makeshift one by taping a plastic bag around the body. This will help contain the paint and protect the areas that you do not want to be painted. Alternatively, you can use masking tape to cover the areas you want to protect.
If you plan to use a window mask, apply it to the inside of the body, using the molded window lines as a guide. Press down all the edges of the mask firmly to prevent paint from seeping underneath. You can also use adhesive shapes, such as stars or circles, as pre-cut masks to add unique designs to your paint job.
Once the cleaning and masking are complete, you may want to test your paint application on a piece of cardboard. This will help you get a feel for the speed and technique required for even paint coverage.
Remember to always use paints specifically designed for polycarbonate or Lexan surfaces, as other types of paint may not adhere well and could result in cracking or flaking.
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Painting techniques
Painting an RC car body can be a challenging task, especially for beginners. However, with the right tools, preparation, and techniques, you can achieve great results. Here are some detailed instructions and tips to help you paint your RC car body like a pro:
- Choose the right paint: Select paint specifically designed for polycarbonate or Lexan surfaces. Polycarbonate paint is ideal for RC car bodies as it adheres well to the plastic, is durable, and resistant to UV rays. TAMIYA's PS spray paints are a popular choice for polycarbonate bodies, offering a wide range of colours.
- Prepare the work area: Set up your workspace in a well-ventilated area to avoid inhaling paint fumes. Choose a spacious area that allows you to work comfortably and protects surrounding objects from paint spray. Consider using a piece of cardboard as a test surface to practice your spraying technique and determine the ideal spraying speed for even paint coverage.
- Clean the body: Before painting, thoroughly clean the RC car body to remove any dirt, grease, or residue. Use a soft sponge, dish soap, and warm water to scrub the surface gently. Rinse and dry the body completely before moving on to the next step.
- Masking and taping: Use masking tape to cover any areas you don't want to paint, such as windows or specific design elements. Apply the tape carefully, pressing down on the edges to prevent paint from seeping underneath. If you're using a liquid mask, apply two to three coats to the inner surface, allowing each coat to dry properly before applying the next.
- Prime the surface: If you're painting over black plastic parts with a lighter colour, consider using a primer. TAMIYA offers primers in various colours (white, light grey, dark grey, pink, or oxide red) that can help you achieve better coverage with lighter shades.
- Spray painting: Always follow the instructions provided with your RC model. Hold the spray can or airbrush about 10-15 cm away from the surface and spray in steady, even strokes. Start with darker colours and apply several thin coats, allowing each coat to dry before applying the next. Lighter colours might require more coats to achieve the desired opacity.
- Advanced techniques: Consider using a scotch-brite pad to lightly scuff the inside of the body for better paint adhesion. You can also experiment with different finishes, such as a matte finish by applying Flat Clear to the desired areas.
- Drying and curing: Allow the paint to dry completely, and give it enough time to cure properly. This will ensure a strong and durable finish.
- Decals and final touches: Once the paint is dry, you can apply decals to add personal touches to your RC car body. Consider sealing the paint job with a clear coat for added protection.
Remember, practice makes perfect. Don't be afraid to experiment and learn from your mistakes. With each attempt, you'll gain more experience and confidence in painting your RC car bodies.
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Finishing touches
Once you've painted your RC car body and allowed it to dry, it's time to add the finishing touches to make it truly unique and personalised. Here are some ideas and tips to help you achieve a professional and polished look:
Decals and Stickers
Decals, stickers, and other details can add personality to your RC car body. First, prep the surface by cleaning the areas where you will be applying the decals with rubbing alcohol or a mild detergent, and let them dry completely. Carefully apply the decals by peeling off the backing, centring it on the desired spot, and using a credit card or similar tool to smooth out any air bubbles. Allow the decals to dry completely before handling the car. If you want to create custom designs, you can print them on decal paper using an inkjet printer and then apply them.
Clear Coat
Applying a clear coat is essential to protect your paint job from scratches, fading, and UV damage. It also adds a glossy finish and seals in the colours. Make sure to use a clear coat designed for Lexan or polycarbonate bodies, and apply it in thin, even layers to achieve a smooth and durable finish. Allow the clear coat to dry completely before handling or assembling the body onto your RC car.
Handling and Trimming
Be gentle when handling your RC car body to prevent smudging or damage to the paint or decals. Carefully remove any masking tape used during the painting process, using a hobby knife or trimming scissors to cut away excess tape around edges and tight corners for a smooth, clean finish.
Attaching the Body
Follow the instructions to securely attach the body to the car chassis, ensuring it won't come loose during use. You may need a body post/tie wrap kit to help with this step.
Additional Details
For extra shine, consider using a mirror chrome spray paint to add highlights or details to the body or wheels. You can also experiment with different colour combinations, designs, and techniques to create a truly unique look for your RC car.
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Common mistakes
Painting an RC car body can be a challenging task, especially if you are a beginner. Here are some common mistakes to avoid when painting plastic RC car bodies:
Not Using the Right Paint:
Using the wrong type of paint is a common mistake. It is important to use paint specifically designed for polycarbonate/Lexan surfaces, as other types of paint may not adhere well and can crack or flake. Always double-check that you are using the correct paint before starting.
Poor Surface Preparation:
Failing to properly clean and prepare the surface before painting can lead to poor paint adhesion. Make sure to remove any grease, dirt, or residue using a suitable cleaner or dish soap and water. Lightly scuffing the surface with a Scotch-Brite pad can also improve paint adhesion.
Bleeding or Staining:
This occurs when the original finish or primer seeps through the topcoat, causing discolouration. It can be due to a reaction between the colour pigments of the original finish and the solvents of the new coat, or contamination from soluble dyes or pigments on the older finish. To avoid this, ensure that the old finish is properly sealed and follow the instructions for the amount of hardener to use when mixing polyester putty or filler.
Blisters or Bubbles:
Also known as "moisture blisters", this issue is caused by leftover water or solvent trapped in the paint film. It can be avoided by ensuring that all sanding water is removed before applying the topcoat, especially in corners, edges, and crevices.
Cracking:
Cracking can occur if too much material is applied to the surface or if sufficient drying time is not allowed between coats. Using additives not designed for a colour coat can also weaken the paint film and make it more prone to cracking. Always follow the manufacturer's instructions and allow adequate time for drying.
Poor Masking:
Not properly masking off areas that should not be painted can result in paint bleeding through and creating an uneven finish. Take your time to carefully mask off windows and other areas, using high-quality masking tape and pressing down all the edges to prevent paint from seeping underneath.
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Frequently asked questions
Polycarbonate paint is designed for use on polycarbonate surfaces and is ideal for RC car bodies. Lexan/polycarbonate bodies are painted on the inside, so keep this in mind when deciding the order in which to mask and apply colours.
First, you should wash the inner surface of the body with a soft sponge and a bit of dishwashing soap. Once the body has dried, apply a liquid mask on the inner surface of the body in two or three coats.
Using a spray can is a quick and easy way to paint an RC car body, even for large areas. If you are using a spray can, always spray in a well-ventilated area.
Using the molded-in window lines as a guide, apply the window masks to the inside of the body. Be sure to press down all the edges to keep paint from sneaking under. First mask off the colour that you want to paint last.
