Primer
Creates surface adhesion before painting.

Model builders usually compare nozzle size, paint compatibility, compressor stability, cleaning effort, and replacement-part availability before selecting an airbrush setup. Different projects such as Gunpla, military models, miniatures, and RC bodies often require different airbrush configurations.
Most beginners focus on nozzle size first. Experienced model painters usually focus on workflow.
A complete model painting workflow often includes surface preparation, Primer application, Base Coat spraying, Zenithal Highlighting, camouflage layers, Weathering effects, and Clear Coat protection.
For most Gunpla, military models, Miniatures, Warhammer figures, Scale Models, and RC Models, predictable compressor output and cleaning discipline are often more important than extremely fine nozzle sizes.
Many hobby workshops prefer 0.3 mm airbrushes because they balance detail work and coverage. A shop owner can teach beginners, demonstrate basic thinning, and still support more experienced builders without moving every customer to a fragile 0.2 mm setup.
The real complaints in model painting usually come from paint preparation, moisture, tip dry, and missing spare parts. A 0.2 mm gun can spray beautiful panel lines, but it becomes a return risk when sold to a beginner who wants to spray primer, base coat, and clear coat through the same fine setup.
Hobby shop owners also think about repeat sales. Needles, nozzles, cleaning brushes, quick disconnects, moisture traps, and paint sets are not extras; they keep customers painting after the first clogged nozzle or bent needle.
Creates surface adhesion before painting.
Applies the main color layer efficiently.
Adds depth and light direction effects.
Simulates dirt, rust, dust, and battle damage.
Requires controlled spray patterns and masking.
Protects decals and final paintwork.
Why it happens: Many beginners think smaller nozzles are always better.
Reality: 0.2 mm nozzles clog more easily and are less efficient for primer and base coats.
Better choice: Start with 0.3 mm.
Why it matters: Condensation inside air lines causes paint splatter, especially during longer workshop sessions.
Better choice: Use moisture traps and regulators.
Why it matters: Many clogging issues come from paint viscosity, not from a defective airbrush body.
Better choice: Adjust paint consistency before spraying.
Why it matters: Color changes during model painting happen frequently, especially on camouflage, weathering, and panel line work.
Better choice: Flush between colors.
| Nozzle Size | Best For | Advantages | Limitations |
|---|---|---|---|
| 0.2 mm | Miniature details, Panel Lines, fine highlights | Maximum detail | More clogging |
| 0.3 mm | Gunpla, Warhammer, general hobby work | Best balance | Not ideal for large primer jobs |
| 0.5 mm | Primer, Base Coat, large surfaces | Fast coverage | Less detail control |
Most hobby shops and model painting workshops rely on 0.3 mm as their primary setup. Military model builders often keep both 0.3 mm and 0.5 mm systems.
| Paint Type | Model Painting Use |
|---|---|
| Acrylic Paint | Most beginner-friendly |
| Lacquer Paint | Fast drying and durable |
| Enamel Paint | Weathering and detail work |
| Primer | Surface preparation |
| Clear Coat | Final protection layer |
Airbrush performance depends heavily on paint thinning ratio, nozzle size, and air pressure. Many spraying problems are caused by paint preparation rather than equipment defects.
| Hobby Type | Nozzle | Compressor | Use |
|---|---|---|---|
| Gunpla | 0.3 mm | Mini tank compressor | General painting |
| Warhammer | 0.3 mm | Quiet compressor | Miniature painting |
| Military Models | 0.3 + 0.5 mm | Tank compressor | Primer and Weathering |
| RC Models | 0.5 mm | Higher airflow setup | Large body coverage |
| Scale Models | 0.3 mm | Compact compressor | General hobby use |
| Hobby Shops | 0.3 mm | Continuous-duty compressor | Training and demonstrations |
Most beginners are better served by 0.3 mm. It can handle Gunpla, Warhammer, Miniatures, base coat work, and many hobby paints with fewer clogging issues than 0.2 mm. A 0.2 mm airbrush is useful later for panel lines, fine highlights, and tight detail work after the user understands thinning and cleaning.
It can be done with very well-thinned primer, but it is not the setup most hobby workshops choose for repeat use. Primer is heavier than many color coats, so 0.3 mm or 0.5 mm usually saves time and reduces tip dry, sputtering, and nozzle cleaning during a session.
Miniature painters often work around a lower pressure range for detail and zenithal highlighting, then adjust based on paint brand, thinning ratio, and nozzle size. The exact PSI is less important than testing the spray pattern on a card before touching the model.
Paint spitting usually comes from condensation in the air line, unthinned paint, dried paint on the needle tip, or a partially blocked nozzle. A moisture trap, correct thinning, and flushing between colors solve many of these complaints before the airbrush is blamed.
During model painting, the nozzle should be flushed between color changes and checked when switching from primer to base coat or clear coat. Waiting until the project ends is a common reason for dried paint buildup and uneven spray.
A tank compressor is useful for workshops, longer sessions, and painters who want fewer pressure pulses. Compact compressors can still work for hobby use, but a tank model is easier to recommend for training tables, military model builders, and repeated demonstrations.
One 0.3 mm airbrush can cover many hobby tasks, but it is a compromise. Many experienced model builders keep a 0.3 mm setup for general work and a 0.5 mm setup for primer, Base Coat coverage, and clear coat protection.
Tell us your project type, paint system, nozzle preference, and expected order quantity. We can recommend a suitable airbrush, compressor, and accessory configuration for your model painting workflow.