Alexei Volkov
When it comes to painting plastic models, there are a variety of paints to choose from, each with its own unique properties and considerations. One popular option is acrylic spray paint, which is known for its durability and ability to chemically etch itself into the plastic surface. However, it's important to distinguish between water-based acrylics and solvent-based acrylic lacquers, as the latter is known for its strong odour and should be used with caution. In this discussion, we will explore the pros and cons of using acrylic spray paint for plastic models, offering insights into the painting process and the potential outcomes.
| Characteristics | Values |
|---|---|
| Paint Type | Water-based and solvent-based |
| Paint Consistency | Thin and sprayable |
| Paint Composition | Pigments, binders, and water or organic solvents |
| Drying Time | Acrylics dry faster than lacquers |
| Durability | Lacquers dry harder than acrylics |
| Surface Preparation | Plastic surfaces may need priming or sanding |
| Application Method | Brush or airbrush |
| Ventilation | Well-ventilated areas or outdoor spaces |
| Personal Protective Equipment | Respirators and masks |
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What You'll Learn
Spray paint vs. acrylic paint for plastic models
When it comes to choosing the right paint for your plastic models, there are a few options to consider: spray paint or acrylic paint. Both have their own advantages and disadvantages, and the best choice for you will depend on your specific needs and preferences.
Spray paint, also known as lacquer paint, is a solvent-based paint that is commonly found in spray can form. It can also be found in bottle form, which is ideal for airbrushing. One of the biggest advantages of spray paint is its hardness upon drying, which makes it easy to polish into a mirror-like finish, especially on model cars. Spray paint also offers a wide range of colour variations and options for high-gloss finishes. However, one of the drawbacks of spray paint is its extremely strong odour, which can be overpowering. Therefore, it is recommended to use spray paint only in well-ventilated areas or outdoors, and it is advised to wear a mask when working with this type of paint.
Acrylic paint, on the other hand, is a water-based paint that is available in airbrush-ready and regular versions for brush application. Acrylic paint has a milder odour than spray paint, making it a better option for those sensitive to strong chemical smells. Additionally, acrylic paint dries faster than spray paint, which can be advantageous when working on projects with tight deadlines. However, one of the drawbacks of acrylic paint is that it may not adhere well to plastic surfaces and may require specific care when using. It is also important to note that while acrylic paint dries faster, it may not result in a smooth finish like spray paint.
When deciding between spray paint and acrylic paint for plastic models, it is essential to consider the advantages and disadvantages of each. Spray paint offers a harder finish, more colour options, and high-gloss possibilities, but it has a strong odour and requires proper ventilation. Acrylic paint, meanwhile, has a milder odour, dries faster, and is water-based, but it may not adhere well to plastic and may require additional care. Ultimately, the best choice depends on the specific needs and preferences of the modeller.
In conclusion, both spray paint and acrylic paint have their own unique benefits and drawbacks when it comes to painting plastic models. By considering factors such as odour, drying time, finish, and adhesion, modellers can make an informed decision about which type of paint is most suitable for their projects.
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Water-based vs. solvent-based paints
When choosing the type of paint to use on plastic models, one must consider the differences between water-based and solvent-based paints. Water-based paints, also known as waterborne acrylics, use water as their solvent base. They are generally easier to apply, clean up, and are more environmentally friendly due to lower levels of volatile organic compounds (VOCs). They emit less odour, are safer for indoor use, and dry faster. Water-based paints are also non-toxic and are suitable for both brush and airbrush applications.
On the other hand, solvent-based paints, also known as oil-based or alkyd paints, use organic solvents like mineral spirits or turpentine. They generally result in a stronger odour and higher VOC emissions, which can pose health risks such as headaches, dizziness, and long-term respiratory issues if inhaled. Solvent-based paints also require hazardous chemicals for clean-up and have a longer drying time.
One advantage of solvent-based paints is their performance in low-temperature applications. They are recommended when temperatures drop below 10°C, as water-based paints are more affected by freezing temperatures, causing them to run and take longer to dry. Additionally, solvent-based paints, specifically lacquer paints, dry harder than water-based paints, making them easier to polish into a mirror-like finish.
It is important to note that both types of paints can be used on plastic models, and the choice depends on the modeller's preference and the features of the model's surface. Water-based paints are generally easier to work with and are safer for indoor environments, while solvent-based paints offer advantages in specific situations, such as low temperatures and the desire for a harder, more polished finish.
When using water-based and solvent-based paints together on a model, it is crucial to ensure that each layer of paint is completely dry before applying a new coat. The solvent base in lacquers may reactivate the layers of acrylic paint, causing the layers to merge or seep into each other. Testing the new layer on a small portion of the model before full application is recommended to avoid any adverse reactions.
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Using lacquer paints on plastic models
Lacquer paints are solvent-based paints that are commonly found in spray can forms. They are also available in bottles, which are ideal for airbrushing. Lacquer paints are also referred to as 'acrylic lacquers' and should not be confused with acrylic water-based paints.
Lacquer paints are a popular choice for painting plastic models. They dry much harder than acrylics and enamels, resulting in a durable finish. Lacquers also offer a wider range of colour options and high-gloss finishes, making them ideal for model cars. The hardness of the dried lacquer allows for easy polishing to achieve a mirror-like finish.
When using lacquer paints, it is important to work in a well-ventilated area or outdoors due to their strong odour. It is recommended to wear a mask to protect yourself from the fumes. Additionally, ensure that each layer of paint is completely dry before applying another coat. Lacquer paints dry quickly, allowing you to continue working on your model without lengthy waiting periods.
Acrylic lacquer paints, such as the Floquil brand, can also be used as primers for plastic models. They chemically etch themselves into the plastic surface, providing a durable base for further painting or finishing. Tamiya Acrylics, for example, are water-based acrylic lacquers that can be thinned with water, alcohol, or lacquer thinners, although they perform best with the latter.
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Vallejo paints for plastic models
Vallejo is a well-known brand in the modelling world for its high-quality acrylic paints and supplies. Their range of products includes Model Color, Model Air, Game Color, Game Air, Mecha Colors, Panzer Aces, and hundreds of paint sets within each of these lines. Vallejo's acrylic paints are water-based and optimised for airbrushing, making them a popular choice for plastic models.
Vallejo's Model Color range offers a wide variety of colours and effects, such as the WWII American Armour & Infantry Wargames Paint Set, the Old & New Wood Effects Paint Set, and the Face & Skin Tones Model Color Paint Set. These paints can be applied by hand brush and allowed to dry and cure overnight before being clear-coated.
The Vallejo Model Air range is also extensive, with colours like US Modern Desert Colors, WWII Allied Model Colors, and USAF Colors Gray Schemes. These paints are designed to be used with an airbrush and can be thinned with Vallejo's Airbrush Flow Improver for better performance.
In addition to their colour and effect options, Vallejo offers a range of auxiliary products such as primers, thinners, and varnishes. Their Black Primer and Grey Primer are popular choices for preparing surfaces for painting, while their Thinner is designed to be used with their acrylic paints to improve flow and ease of application.
When using Vallejo paints for plastic models, it is important to follow the manufacturer's instructions and allow adequate drying time between coats. Additionally, when using any type of paint, including Vallejo, it is crucial to work in a well-ventilated area or outdoors due to the strong odour of some paints.
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Acrylic paint application techniques
Acrylic paint can be applied to plastic models using a variety of methods, including airbrushing, hand brushing, and spraying. Here are some techniques and tips for achieving the best results when painting plastic models with acrylics:
Airbrushing
Airbrushing is a popular method for applying acrylic paint to plastic models. It can be used to create a smooth and even finish. Airbrush-ready acrylic paints are available, which have a thinner consistency and can be easily sprayed. When using an airbrush, ensure you have a well-ventilated area and wear a respirator to protect yourself from fumes.
Hand Brushing
Hand brushing is a common technique for painting plastic models, especially for beginners. It allows for more control and precision when applying paint. When hand-brushing with acrylics, use a good-quality brush, and consider using a primer to ensure the paint adheres well to the plastic surface. Tape off any areas you don't want to paint, and always work on a stable surface.
Spraying
Spraying is another option for applying acrylic paint to plastic models. Spray primers, for example, can be distributed quickly and evenly, providing a smooth base for subsequent paint layers. When spraying, ensure you are in a well-ventilated area and follow the manufacturer's instructions for curing or drying times.
Paint Types and Compatibility
It is important to note that not all acrylic paints are compatible with plastic. Cheap acrylics, in particular, may require special preparation of the plastic surface or the use of a primer. Acrylic lacquer paints, however, are known to work well on plastic and are ideal for hand brushing. If using water-based acrylics, you can apply solvent-based clear coats over them once they are fully cured.
Finishing Techniques
To achieve a glossy finish, consider using lacquers, which dry harder than acrylics and enamels and offer more colour variations. For a different texture, try dabbing the paint on with a sponge instead of applying it with brush strokes. To protect your acrylic paint from flaking, apply a final coat of varnish, as acrylics don't adhere well to plastics.
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Frequently asked questions
There are two main types of paint for plastic models: water-based and solvent-based. Lacquer paints are solvent-based paints that are commonly found in spray can form and are also called 'acrylic lacquers'. Lacquers dry harder than acrylics and enamels and are easy to polish into a mirror-like finish. Acrylics, on the other hand, dry faster than enamels and lacquers.
Lacquer paints have a variety of colour options and are suitable for high-gloss finishes, especially for model cars. They can also be used as primers as they chemically etch themselves into the plastic surface, making them durable. Additionally, they can be layered with clear coats and varnish or sanded back for repairs.
Yes, you can use spray paint on plastic models. However, it is important to use quality spray paint designed for plastic, such as Vallejo paints, to avoid issues with the paint eating the plastic or never drying.
