Alexei Volkov
Plastic modelling is a popular hobby, and airbrushing is a technique that can be used to make models look more realistic. Airbrushing involves spraying paint onto a model using a gun and compressed air. The paint flows from a container into the gun and then into the spray head, resulting in a fine colour mist that allows for smooth transitions, special effects, and accentuations. While airbrushing can be a great way to achieve a detailed and professional look, it does require some practice and has higher costs for equipment. Additionally, cleaning the airbrush after spraying can be complex.
| Characteristics | Values |
|---|---|
| Process | Spray paint using a gun and compressed air |
| Equipment | Airbrush gun, air compressor, hose |
| Paint Flow | Paint flows from a container into the gun and then into the spray head |
| Result | Fine color mist, smooth transitions, special effects, and accentuation |
| Benefits | Faster paint application, realistic look, detailed shading and effects |
| Drawbacks | Higher costs, complex cleaning |
| Tips | Pre-shading for highlighting panel lines, maintenance tools for needle fixing |
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What You'll Learn
Airbrush equipment
Airbrushing is a special process that uses a small, lightweight airbrush gun to spray paint onto a model. The gun is connected to an air compressor via a hose and is operated by a small lever. The paint flows from a container into the gun and then into the spray head, resulting in a very fine colour mist. This allows for particularly successful flowing transitions, special effects, and accentuations.
When choosing airbrushing equipment, it is important to select a high-quality airbrush gun and compressor. Some popular brands of airbrushes include Harder & Steenbeck, Badger, and Sparmax. The cost of purchasing an airbrush gun and compressor can be relatively high, but it is possible to find kits that include both the gun and compressor for a more affordable price.
In addition to the gun and compressor, other accessories may be needed, such as a hose, paint containers, and a cleaning kit. It is important to clean and maintain airbrushing equipment properly to prevent damage and ensure the best results.
When selecting paint for airbrushing, it is recommended to use airbrush-ready paint, especially for beginners. These paints have already been thinned to the correct consistency, which is important for achieving the desired results. However, other types of paint can be used as long as they are diluted with a thinner to achieve the right consistency.
Practising on a sample model or a piece of paper is a good way to get started with airbrushing. It may take some time to get used to the technique, but the results can be very rewarding, with a more realistic and detailed look than other painting methods.
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Airbrush techniques
Airbrushing is a special process in which you spray paint onto a plastic model using a gun and compressed air. The paint is mixed with air inside the airbrush and dispersed onto the model, resulting in a finer atomization and more precise, consistent patterns.
- Practice the basic techniques in advance on a simple model or scrap parts to refine your technique.
- Work in a safe and well-lit environment with proper ventilation. Protect your airways with a mask and your eyes with goggles from the very fine paint mist.
- Use a small, lightweight airbrush gun that is easy to hold and guide by hand when spraying.
- Connect the gun to an air compressor via a hose, and operate it with a small lever or trigger.
- Adjust the air or paint supply to create different effects, and swap out the paint needle for even more variety.
- Hold the airbrush 10-18 cm (4-7 inches) from the model surface when applying a base or general coat, and use a pressure of 15-20 psi.
- Add thinner to the paint to ensure a smooth flow and prevent clogging. A thinner-to-paint ratio of 1:3 is generally recommended.
- Clean your airbrush regularly to remove dried paint and prevent clogging. Use a cleaning solution or thinner, allowing it to soak for several minutes before spraying it through the brush.
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Cleaning the airbrush
Cleaning your airbrush after each use is crucial to maintaining an efficient, operating airbrush. A well-maintained airbrush will give you many years of trouble-free service.
The first step is to disassemble the airbrush. If you are unsure about how to do this, consult the manufacturer's instructions. Once disassembled, use a clean, soft brush to remove any residue from the top-mounted cup or accessible internal paint chamber. You can also use a cotton swab to clean the fluid cup and the narrow funnel where the paint flows through. For a siphon feed-style airbrush, use a wider pipe cleaner for the inside of the channel.
The next step is to flush through the airbrush. Begin by blowing an appropriate cleaning agent, thinner, solvent, or clean water through the airbrush. The solvent you use to thin your paint will also remove it from your airbrush. For example, if using enamel paints, use an enamel thinner or white spirit. Water-based paints can be removed with clean water, but be sure to avoid letting the paint dry inside the airbrush, as water alone will not remove hardened paint residue.
If you are dealing with stubborn paint, you can use acetone, but this should be a last resort as it can damage airbrush components. Soak the nozzle in acetone, but do not soak the entire airbrush. Alternatively, use 99% isopropyl alcohol to soak the needle cap, nozzle, and nozzle cap, and wipe the needle clean with the same solution.
Finally, rinse the airbrush parts with distilled warm water, ensuring that all cleaning liquid is removed. Set the parts out on a towel to air dry, shaking off any excess moisture. Once completely dry, reassemble the airbrush according to the manufacturer's instructions.
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Pre-shading
When pre-shading, it is important to consider the size of the spray line. Some modellers thin their paint to achieve a finer line, while others use a dual-action airbrush to achieve the desired effect. Pre-shading can be done before or after priming the model, depending on the desired outcome. If pre-shading is done in black before priming, it may still show through the primer and topcoat. Alternatively, the model can be primed first, and then pre-shaded before the topcoat is applied.
The advantage of pre-shading is that it can enhance the realism of the final model, creating subtle shadows and depth that would otherwise be difficult to achieve. It is particularly useful for large models with many panel lines, such as model vehicles, as it can speed up the painting process and create a more professional finish.
However, pre-shading can also be challenging, especially for beginners. It requires practice to master the technique and achieve consistent results. Additionally, the equipment required for airbrushing can be costly, and the cleaning process after spraying can be more complex than with other painting methods. Nonetheless, for those seeking to create highly detailed and realistic models, pre-shading is a valuable technique to add to their modelling repertoire.
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Multi-colour camo
To create a multi-colour camo effect, you will need an airbrush that can hold a fine line. The fineness of the line is determined by the diameter of the needle and nozzle. If you are working on a larger model, such as 1/32 aircraft, you can use a larger nozzle. However, for smaller models or more detailed work, you will need a very fine nozzle. A single-action airbrush can make it easier to maintain a consistent line.
Before you start painting, it is important to plan out your colour scheme and the pattern you want to create. You will also need to thin your paint to the right consistency, considering the pressure of your airbrush and how close you will be to the model. The lower the pressure and the closer you are to the model, the thinner your paint should be.
When mixing paints for airbrushing, it is recommended to use the same brand to avoid potential formula differences that can cause problems. Use a mixing cup to ensure thorough mixing and to avoid spilling paint on your model. Start with your base colour and mark up the pattern you want to create. Then, add small amounts of your other colours to the airbrush paint cup, practising on a separate surface before you start on your model.
To create a soft edge between two colours, start inside the pencil line and work slowly outwards. Build up light coats of paint rather than laying on a thick, wet coat. To avoid paint creeping under the mask, burnish the edge down completely and angle your first coats away from the masked edge.
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Frequently asked questions
Airbrushing is a process in which you spray paint onto a model using a gun and compressed air.
Airbrushing can make a model look more realistic. It is also faster than other paint application methods and can be used to embellish large areas on model vehicles.
You will need an airbrush gun, an air compressor, and other accessories.
Airbrushing equipment can be expensive and the process can be complex, especially when it comes to cleaning the equipment after use.
Pre-shading is a technique used to highlight panel lines and create a more realistic model.
