How to get started with airbrushing

Do you know that feeling when you admire perfectly painted miniatures on your desk, featuring flawlessly smooth color transitions and stunning shading, and you think to yourself: "How the hell do they do that?" I used to look at my own creations, compare them to some pro online, and feel like crying. The answer often lies in the word airbrush.

Where did the airbrush come from?

You might think the airbrush is some modern gadget from the end of the last century. Wrong! The first patent for a device resembling an airbrush was granted to American Abner Peeler back in 1879. Originally, he didn't invent it for painting goblins or space marines, but for retouching photographs and painting watercolors. Over the years, this technology became smaller, more precise, and found its way into car paint shops, to artists, and finally, to our great delight, onto our hobby desks.

How the magic actually works

It looks like magic, but it's pure physics. The core of the matter is the so-called Venturi effect. It works roughly like this: You push compressed air from a compressor through a hose directly into the body of the airbrush. The moment you press the trigger, the air rushes out through a very narrow nozzle. This fast stream of air creates a vacuum just behind the nozzle, which starts sucking paint from the cup. As soon as the paint meets the air stream, it literally shatters into microscopic droplets and flies out as a fine mist. A double-action trigger then gives you control over how strong the airflow is (pressing the trigger down) and how much paint you allow the needle to release into the nozzle (pulling the trigger back).

What it actually is: Pros and cons

Why you will love airbrushing (Pros):

• You will save a brutal amount of time. Base coating (priming) and painting large areas will be done in a fraction of the time compared to using a brush.
• Smooth layers. An airbrush creates such thin layers of paint that you will never flood the fine details on a miniature.
• Perfect transitions and shading. Transitions from dark to light or lighting effects are much more natural and easier to achieve.

Where it hurts (Cons):

• Initial investment. You need an airbrush, a compressor, paints, and paint chemistry, which will cost you a few bucks.
• Learning curve. For the first few evenings, you will struggle with proper paint thinning, pressure settings, and a sputtering nozzle.

Airbrush vs. Spray paint: Who wins?

You might have thought: "Why invest in an airbrush when a spray primer for a few hundred is enough?" A spray can is great for quickly applying one color, but it has limits. Sprays are incredibly sensitive to the weather. Is it cold, humid, or hot outside? The paint will clump in the air and create a rough texture on the miniature. Plus, you cannot smoothly regulate a spray can. In contrast, an airbrush offers surgical precision, and you can work with it comfortably all year round. Furthermore, a bottle of airbrush paint will be many times cheaper for you in the long run.

On the other hand, for basic priming of a model, spray cans are often enough. If only because you don't always have to pull out the entire airbrush setup.

Hardware: What you will be working with

1. Airbrush gun: Forget about cheap plastic single-action airbrushes. For miniatures, you need a double-action airbrush so you have control over both air and paint at the same time.
2. Compressor: You need an oil-free piston compressor, ideally with a pressure tank (air receiver). The compressor fills up, turns off, and you spray with constant pressure without pulsing until the pressure drops and the motor turns on again for a while.
3. Paints and chemistry: You must thin regular acrylic miniature paints. You need a special airbrush thinner (thinner) and flow improver (drying retarder). This prevents the paint from drying on the tip of the needle. You will definitely also find Airbrush Cleaner useful, which you can use to remove paint residue from the airbrush.

Where to spray without suffocating: Workbench and safety

This is crucial. Can you work with an airbrush at a regular table in the living room? Yes, but you need preparation. When you spray paint, part of it ends up on the miniature, but part flies into the surroundings. This is called overspray.

• Protecting the surroundings: Acrylic dust dries while still in the air and settles everywhere. If you don't want a fine film of color on your desk, monitor, and keyboard, you must create a barrier. For starters, a simple large cardboard box placed on its side, in which you will spray the miniatures, is enough.
• Spray booth: If you are serious about this, get (or build) a spray booth with a fan and a filter. It pulls the air with overspray through the filter and blows it out the window through a hose. It's a game-changer for cleanliness in the room.
• Your lungs: Although acrylic paints are not as toxic as synthetics, you really don't want to breathe in stirred-up paint dust. Forget about ordinary FFP2 respirators; they are useless in this case and won't protect your lungs. A high-quality half-mask with filters should be an absolute standard as soon as you touch the trigger. Believe me, your health is worth that little bit of discomfort.

Basic rules of work: How to do it

• Consistency is king: The paint must resemble semi-skimmed milk. It is better to have it thinner and apply more thin layers. This will require some testing. Every airbrush setup can have different parameters, and fine-tuning the right consistency can take a while.
• How to mix: Mix the paint in a cup and only then put the final mix into the airbrush reservoir.
• Trigger movement: The most important habit! First, release the air (press down), then pull back for paint. When finishing the stroke, first move the trigger forward (stop the paint) and only then release the air. You will prevent unwanted sputtering.

Tips for surviving the start

• Don't practice on a finished model! Take a piece of paper or plastic spoons and practice lines, dots, and color transitions. You will get a feel for the trigger.
• When it sputters (graininess): Your paint is too thick or the air pressure is too high. For fine work on miniatures, you typically work with pressure up to one bar. Keeping the airbrush clean is also essential. Sometimes the paint itself causes trouble. White or yellow paints are notorious for this.
• When the paint runs (spiderwebs): You overdid it with the thinner, you are too close to the model with the airbrush, or you have unnecessarily high pressure.

Love and care: Maintenance above all

An airbrush is a delicate, precise mechanical tool. Dried acrylic paint turns into durable plastic. Once it hardens inside the nozzle, you are in for an hour-long battle with sputtering, bubbling, and clogging.

After every color, flush the airbrush exclusively with cleaner. Forget about water; it can cause the paint to clump and make a mess in the nozzle. After finishing work, do a light disassembly: carefully remove the needle and gently wipe it with a tissue moistened with cleaner. Be careful, the tip will bend even if you just look at it the wrong way! Wipe the inside of the cup and blow through the nozzle. The whole process takes a solid ten minutes, but it will save you hours of frustration. Regular and consistent maintenance is the only thing standing between you and throwing the airbrush out the window.

An airbrush can move your miniatures a light-year ahead. You might struggle a bit during the first few evenings, but once you get the thinning and control down, you will never go back to spray cans.