Tamiya spray paints are renowned in the modeling community for their wide range of colors and exceptional quality. The fast-drying lacquer-based paints provide vivid, consistent coverage right on bare plastic. But does this mean Tamiya sprays can skip the priming step?
This is a question that sparks debate among seasoned modelers and hobbyists alike. Some argue Tamiya’s engineering allows direct application to unprimed plastic. Others maintain priming first is still best practice for maximum paint durability. As with most things, the answer depends on your specific project goals and techniques.
Let’s examine the unique properties of Tamiya sprays, the potential benefits priming provides, and methods for avoiding common finish problems. With the right insights, you can determine the ideal approach to unleash the full potential of Tamiya spray paints for your models and miniatures.
How Tamiya Spray Paints Are Different
The key distinction of Tamiya spray paints lies in their lacquer foundation. Unlike enamels and acrylics, Tamiya formulates their paints using lacquer solvents. This provides several advantages for spray painting plastic models and RC bodies:
Strong Adhesion to Plastic
Tamiya’s fast-drying lacquer paints are engineered to adhere well directly to bare plastic components. The lacquer allows the paint to chemically “bite” into the plastic surface, forming a strong mechanical connection.
This differs from relying solely on the chemical bonds between successive paint coats that primer provides. Tamiya’s paint chemistry grips plastic substrates tightly for immediate adhesion.
Vivid Color and Consistent Coverage
The high pigment levels in Tamiya lacquers produce exceptionally vibrant colors. Spraying thin, even coats allows the paint to spread smoothly over intricate model details without obscuring them.
The fine mist application provides consistent, reliable coverage across the entire model surface. Tamiya’s control of paint viscosity and delivery enables detail retention and color accuracy.
Versatile Use Across Materials
In addition to plastic model kits, Tamiya sprays excel at painting RC car bodies, metal miniatures, crafts, and other materials like resin, wood, ceramic, even canvas. Their lacquer foundation adheres well to a variety of surfaces.
With proper preparation and spraying technique, Tamiya lacquers provide gorgeous, professional finishes across many hobby applications.
Requires Proper Spraying Approach
To harness Tamiya spray paint’s full potential requires following precise application guidelines:
- Shake the can vigorously for 2-3 minutes before spraying
- Hold the can 6 to 8 inches from the surface
- Apply light, misting coats first to establish coverage
- Slowly build up color depth with multiple thin layers
- Allow proper drying time between coats as specified
Tamiya lacquers yield smooth, durable paint jobs with the right spraying methods. Rushing the process risks finish flaws and reduced longevity.
Why Use Primer?
Before examining Tamiya sprays specifically, let’s explore why primer is recommended for most paint jobs. Applying primer before the color coat provides several benefits:
Uniform Paint Adhesion Surface
Primer creates a consistent intermediate layer for the topcoat paint to grab onto. This prevents uneven paint absorption into the raw material surface below.
Fills Surface Imperfections
The primer layer helps fill in small dents, scratches, mold lines, or other blemishes in the substrate. This results in a smoother foundation for painting.
Better Coverage and Durability
Primer improves adherence and resilience of the paint layers above for enhanced coverage and longevity. The paint bonds tightly to the uniform primer surface.
For these reasons, conventional wisdom states always using primer when spray painting models and miniatures. But Tamiya’s unique lacquer formulation warrants a closer look regarding priming necessity.
Can Tamiya Sprays Adhere to Bare Plastic?
A core question around using Tamiya spray paints is whether their lacquer formulation can bond successfully to unprimed plastic.
According to Tamiya’s product descriptions, their spray paints are specially engineered to adhere directly to polystyrene and ABS plastics used for scale models and RC car bodies. Does this render primer unnecessary?
Tamiya’s Adhesion Claims
Tamiya asserts their lacquer paints immediately form a tenacious mechanical bond with bare plastic. This grip comes from the paint solvents permeating and hardening within the plastic’s surface layer.
The company claims priming is not essential for Tamiya sprays to stick to plastic model kit and RC car parts. They tout the chemical properties of their lacquer paint as sufficient for durable adhesion.
In practice, many hobbyists report great results spraying Tamiya paints straight onto bare plastic. The colors adhere evenly without obvious signs of flaking or chipping later on.
The fast-drying lacquer allows the Tamiya spray paint to grab onto the raw plastic substrate thanks to its unique bonding properties. For basic model kits, Tamiya’s paint chemistry enables direct application.
However, some modelers argue bonding to bare plastic still carries disadvantages and risks with Tamiya lacquers. Is relying solely on their adhesion claims forgoing potential benefits of priming?
Why Consider Priming Tamiya Sprays?
While Tamiya’s technical specifications boast strong lacquer adhesion to plastic, many hobbyists choose to prime before spray painting their models. What advantages does priming offer even when using Tamiya sprays?
Enhances Paint Adhesion
Primer provides extra insurance the successive color coats will bond tightly. The intermediate layer gives the lacquer paint an optimized surface to grip compared to potentially uneven bare plastic.
Highlights Surface Flaws
Applying primer reveals any small defects in the plastic substrate. The contrasting primer color displays areas needing filler or sanding before final paint coats.
Influences Color Shades
Certain primers tint the plastic surface to warm or cool the subsequent color coats. White primer helps light Tamiya colors pop, while gray or black boost vibrancy of darker tones.
Adds Physical Protection
The primer layer shields the vulnerable plastic material from chemical interaction with paint layers. This safeguards against potential long-term material degradation issues.
While Tamiya lacquers technically stick to bare plastic, priming first enhances adhesion, longevity, and aesthetics. The extra effort often proves worthwhile, especially for demanding applications. But what finish problems can arise?
Avoiding Texture Issues with Tamiya Over Primer
A common challenge spraying Tamiya lacquers over primer is texture inconsistencies in the final finish. The ultra-smooth primer base and Tamiya’s rapid drying time can create an undesirable rough or pebbled texture.
Several methods exist to overcome this spraying over primer:
Apply Light Mist Coats
Misting on light layers of Tamiya paint allows the coloring to flatten out smoothly on the primed surface before drying. Heavier coats are more prone to textures issues.
Wet-Sand Primer Layer
Lightly sanding the primer with fine grit sandpaper knocks down the surface peaks. This prepares a flatter, smoother foundation for the Tamiya spray paint.
Use Lacquer-Based Primer
Opting for a compatible lacquer primer provides a comparable base layer as Tamiya’s lacquer paint. This reduces inconsistencies in paint drying and texture.
Thin Tamiya Paints for Airbrushing
Adding lacquer thinner to Tamiya paints makes them less dense for airbrushed application over primer. The wider spray pattern and paint fluidity provide better flow control for consistent finishes.
Allow Proper Drying Time
Providing sufficient drying time between coats remains critical to prevent textures. Follow the manufacturer’s guidelines closely when spraying Tamiya over primer.
Testing these methods allows discovering the best combinations of primer, paint, and preparation techniques for smooth Tamiya spray paint results.
Experimentation Reveals the Best Approach
Determining the ideal painting methods with any Tamiya spray color relies heavily on real-world testing. Every lacquer paint, primer, plastic, and clear coat pairing may interact slightly differently.
Experimenting provides the experience necessary to dial in products and processes that work cohesively for your particular models. Here are some suggested ways to test Tamiya spray paint performance:
Sample Spray on Plastic Spoons
Plastic spoons provide the perfect disposable test surface for sampling Tamiya spray techniques risk-free. Primer application methods, paint combinations, and clear coats can be evaluated.
Create Paint Swatch Cards
Priming strips of cardboard or plastic allows testing Tamiya spray colors over various primer shades. The cards become quick references for how primers shift hues.
Try Techniques on Scrap Models
Practicing full spraying workflows on scrap model sprues is ideal for identifying potential finish problems before tackling the real kit. This helps optimize the processes.
Assess Adhesion After Curing
Checking cured Tamiya paint adhesion using tape tests or by chipping/scratching paint.
Adapting Techniques for Smooth Tamiya Spray Paint Finishes
With testing and experience, modelers can adapt techniques to achieve flawless results with Tamiya sprays over primer:
Optimize Spray Paint Preparation
Ensuring Tamiya cans are shaken thoroughly pre-mixing the pigment is essential. Some colors also spray better warm or when humidity is low to prevent frosting.
Refine Spray Painting Motion
Move the spray can slowly and steadily over the model at the optimal 6 to 8 inch distance. Avoid holding the can too close or lingering too long in one spot.
Employ Drying Techniques
Use heat lamps, dehumidifiers, or baking in the oven to accelerate drying when applying multiple Tamiya coats to prevent texture issues.
Consider Clear Coat Options
Some modelers suggest a gloss coat over Tamiya paint helps colors level better before applying flat/matte coats for the final sheen.
Wet Sanding to Smooth
Lightly sanding between coats with fine sandpaper smooths small texture imperfections. This ensures each layer cures uniformly.
Blend Paint with Thinner
Adding 10% to 30% lacquer thinner lets Tamiya spray paints self-level better when airbrushed over primer for flawless model finishes.
Factors for Different Model Types
The ideal priming approach when using Tamiya lacquer spray paints depends partly on the specific model and plastic type.
Materials used for various kits and components may require special considerations:
ABS, Styrene Plastics
Since Tamiya sprays are formulated for model kit plastics like ABS and polystyrene, they generally adhere well to bare plastic. Priming provides added protection.
Resin, Vinyl, Rubber Parts
Softer plastics are prone to chemical reactions with lacquer paints. Priming these materials is advised to prevent potential damage or defects.
Clear Canopies, Windows
Tamiya paints can potentially cloud clear plastic. Priming helps block contact of lacquer solvents with the bare plastic to maintain transparency.
While formulated for plastics, Tamiya adheres well to metals too. Priming metals provides maximum paint grip and hides imperfections.
Assessing the model plastic type and spraying appropriately allows getting the best results from Tamiya lacquers. Adapting the process based on material needs prevents finish flaws or part damage.
Achieving Professional Finishes With Tamiya Sprays
When used properly, Tamiya’s lacquer-based spray paints can achieve exceptional, professional-grade finishes on plastic models. By understanding the unique spray properties and characteristics, modelers can unlock the full potential of these paints.
While Tamiya sprays technically adhere to bare plastics straight from the can, priming first provides added benefits for demanding applications:
- Enhanced paint grip for maximum adhesion
- Protects plastic from reactions for long-term durability
- Smooths flaws for a pebble-free uniform finish
- Allows color manipulation with primer tints
Determining the best painting methods requires testing primer, paint, and prep combinations to identify optimal workflows. Adapting spraying techniques and catering the process to specific models allows Tamiya lacquers to deliver museum-quality paint jobs.
The debate around using primer with Tamiya spray paints involves weighing factors of effort, cost, and performance. With smart practices, Tamiya lacquers can provide stunning results on plastic models whether you prime first or spray directly. Experiment until you unlock the right approach for your projects.