This Gunpla Painting Guide is designed to help you take the next massive leap in your building journey. While snapping kits together is a great start, painting is where you truly transform a mass-produced model into a unique work of art. In this lesson of our Gunpla 101 series, we are breaking down the essential chemistry, safety protocols, and tools you need to master.
1. The Big Three: Gunpla Paint Types Explained
Choosing the right paint isn’t just about picking a color; it’s about understanding how different chemicals interact with plastic. This Gunpla Painting Guide categorizes paints into three primary groups:
- Acrylics: These are highly beginner-friendly and often labeled as water-based. Brands like Vallejo offer true water-based options, while Tamiya and Mr. Hobby Aqueous are technically alcohol-based. They are lower in toxicity, making them ideal for indoor airbrushing.
- Enamels: If you want extreme durability and a slower drying time, enamels are perfect for detailed hand painting. Just be careful—enamel thinner is an absolute must for cleaning up panel lines, but strong solvents can eat through your underlying acrylic base coats.
- Lacquers: These provide unparalleled durability and dry the quickest, giving you that rock-hard finish. However, they come with toxic fumes. Safety is strictly non-negotiable—always use a respirator and proper ventilation when working with lacquers.
2. The Chemistry: Matching Paints to Thinners
A common mistake highlighted in this Gunpla Painting Guide is using the wrong thinner. You cannot just pour any solvent into a cup and expect a smooth finish.
- Water-Based Thinners: True acrylics require an airbrush thinner made of distilled water, alcohol, and a fluid retarder to prevent the paint from drying on the needle.
- Brand-Specific Solvents: Alcohol-based acrylics require their specific brand thinner, like Tamiya X-20A. Do not confuse this with Tamiya X-20, which is exclusively for enamels.
- Lacquer Thinners: For the best results, use a “leveling” thinner. This includes a retarder that slows down drying time, allowing the paint to settle perfectly flat for a professional, “factory” look.
3. The DK Hobby Hack: Homemade Airbrush Thinner
If you are looking to save money while following this Gunpla Painting Guide, creating your own thinner is a game-changer. It is highly compatible with most water and alcohol-based acrylics.
The Ultimate DIY Recipe (120ml)
- The Base: Mix a 1:1 ratio of 70% Isopropyl Alcohol to Distilled Water. (If using 99% alcohol, adjust to a 2:1 water-to-alcohol ratio).
- The Flow: Add 2ml of Airbrush Flow Improver to the mix.
- The Retarder: Add 2ml of Fluid Retarder to ensure the paint doesn’t dry too quickly in your airbrush.
4. Preparing the Canvas: Primer Essentials
No Gunpla Painting Guide would be complete without emphasizing the importance of a good primer. Primer creates a “tooth” for the paint to grab onto, ensuring your hard work doesn’t chip off the moment you pose your kit.
- Gray Primer: The industry standard. It provides a neutral base that doesn’t shift the hue of your final paint colors.
- White Primer: Use this if you are painting bright colors like yellow, red, or white. It ensures the colors pop without needing ten layers of paint.
- Black & Gloss Black: Use black for a “pre-shading” effect or for dark, moody custom colors. Gloss black is the specific secret to making chrome and metallic paints look like real metal.
- Surface Prep: Keep in mind that purely water-based primers usually require you to sand the plastic first. If you want to skip the sanding, look for Aqueous Surfacers which offer better natural adhesion.
5. Advanced Tips for a Flawless Finish
To round out this Gunpla Painting Guide, remember that patience is your best tool. Always spray in light, thin “mist” coats rather than one heavy “wet” coat. This prevents runs, drips, and the loss of fine molded detail on your Gundam’s armor. Additionally, ensure your workspace is free of dust, as wet paint acts like a magnet for tiny particles that can ruin a perfect finish.
- Airbrush: Gaahleri Air Brush 98 Dual
- Compressor: Gaahleri Compressor 1L Dual Air Outlet
- Paint: Vallejo Metallic Set Model Air Paint Set
- Thinner: Tamiya X-20A
- Safety Gear: Respirator Mask