Galaxy Painting for Kids: A Step-by-Step Airbrush Guide

If you’re looking for a kids’ art project that actually looks cool when it’s done, galaxy painting is it. Kids love it. Parents love it. And with a battery-powered cordless airbrush, the whole thing is way more manageable than it sounds.

This step-by-step airbrush galaxy painting tutorial walks you through the whole process using NO-NAME acrylic airbrush paints and a cordless airbrush kit, both available at SprayGunner.com. No prior airbrush experience needed. Just a canvas, some paint, and a kid who’s ready to make something they’ll actually want to hang on the wall.

What You’ll Need

Round up these supplies before you get started:

• Cordless Airbrush Kit (Battery-Powered)
• NO-NAME Acrylic Airbrush Paints — Blue, Purple, Black, White
• Small canvas or thick art paper (at least 140 lb / 300 gsm)
• Paper towels and a cup of water for cleaning between colors
• Old toothbrush or small paintbrush for star effects
• Apron, face mask, and gloves for the kids
• Newspaper or a plastic mat to protect your work surface

Pro tip: NO-NAME water-based acrylic airbrush paints are non-toxic and easy to clean up, which makes them a solid choice for kids’ airbrush projects. They spray well straight from the bottle with little to no thinning.

Step-by-Step: How to Paint a Galaxy with a Cordless Airbrush

Step 1: Get Your Workspace Ready

Find a spot with good airflow. Outside works great, but a room with open windows does the job too. Lay down newspaper or a plastic mat, get the kids suited up with their aprons and face masks, and you’re good to go.

Quick note: An adult should be hands-on for any airbrush work with younger kids. It’s not a big deal, just something to stay on top of.

Step 2: Start with Blue

Skip the black base coat. This galaxy painting starts with color. Load up your cordless airbrush with NO-NAME blue acrylic airbrush paint and start laying it down across the canvas. Focus the heavier coverage toward the center, where the nebula glow will eventually live. Keep the edges lighter for now.

A few things to keep in mind:

• Keep the airbrush about 6–8 inches far from the canvas
• Sweep side to side and use soft circular motions for natural-looking coverage
• Go light on the first pass. You can always add more, but you can’t take it back
• Uneven coverage is fine here. This isn’t a wall; it’s outer space

Step 3: Layer in the Purple

Give the airbrush a quick flush, then switch over to NO-NAME purple acrylic airbrush paint. Start working it into the blue, especially toward the upper and outer parts of the canvas. You’re not painting over the blue; you’re building on top of it.

Where the two colors meet, they’ll naturally blend into each other. That soft blue-to-purple gradient is exactly what gives airbrush galaxy paintings their depth. Let it happen. Don’t fight it.

Try:

• Arcing sweeps that follow the shape of the nebula you’re building
• Overlapping passes to get a smooth color transition
• Pulling back on the trigger slightly toward the edges for softer, wispy coverage

Step 4: Push Back the Edges with Black

This is where the painting really comes together. Load NO-NAME black acrylic paint and bring it in around the corners and outer edges of the canvas. The black frames everything and pushes the blue and purple forward, making the nebula look like it’s glowing from within.

Keep the black where it belongs:

• Corners and edges only. Don’t let it creep into the center
• Blend it gradually into the colors rather than drawing a hard border
• Step back and check your work as you go. If it starts looking heavy, lighten up

The contrast is what sells it. Dark edges, bright center. That’s the whole look.

Step 5: Add the Glow

Load white paint into the airbrush and lightly mist the centers of your colored areas. This creates that iconic glowing nebula effect — like your galaxy has its own light source.

Experiment with:

• Tiny white bursts in concentrated areas
• Light, foggy hazes blending into the colors
• Spiral or circular motions for galaxy arms

Step 6: Splatter the Stars

This is every kid’s favorite step. Dip an old toothbrush into white paint and gently flick the bristles toward the canvas. Instant star field. Seriously, it never gets old.

For bigger, bolder stars:

• Use a fine-tip paintbrush to dot individual stars
• Add a tiny crosshatch or starburst shape for the brightest ones

Step 7: Let It Dry

Set the canvas somewhere safe and leave it alone. Thin airbrush layers usually dry in 15–30 minutes. Heavier areas can take up to an hour.

Touch it too early and you’ll know about it. Give it time.

Step 8: Clean the Airbrush

Don’t skip this part. Cleaning your cordless airbrush after every session is what keeps it working properly the next time you pick it up.

• Empty any paint left in the cup
• Rinse with water or airbrush cleaning solution
• Spray clean water through until it runs clear
• Wipe the needle tip carefully with a damp paper towel

Have an adult handle the needle cleaning. It’s a good habit to build into the routine from day one.

A Few More Tips Worth Knowing

• Test your spray distance and pressure on a piece of scrap paper before you touch the canvas
• Colors mix right on the canvas when you layer them. Use that to your advantage instead of fighting it.
• Want to paint alien planets? Spray a tight circle, then add surface details with a fine brush
• Try a warm palette next time. Reds, oranges, and yellows make for a totally different kind of galaxy

No two galaxy paintings ever come out the same. That’s not a bug; it’s the whole reason this project works so well with kids.

Why a Cordless Airbrush Works So Well for This

A traditional airbrush setup with a separate compressor and hose is a lot to manage, especially with kids involved. A battery-powered cordless airbrush cuts out most of that friction.

• No hoses or cords getting in the way
• Light enough for kids to hold without it being a workout
• Consistent airflow so the paint goes where you point it
• Simple to clean and put away between sessions
• A great first step for anyone curious about airbrush art, scale modeling, or miniature painting

Add a set of NO-NAME acrylic airbrush paints to the mix and you have a beginner airbrush setup that actually works without making everyone frustrated.

Final Thoughts

Galaxy painting is a fantastic beginner project because kids can be creative without worrying about perfect shapes or lines. Using a cordless airbrush from SprayGunner makes the process easier, cleaner, and more exciting for first-time artists. With just a few colors and imagination, kids can turn a blank canvas into their very own universe.

Pick up a cordless airbrush kit and some NO-NAME acrylic airbrush paints at SprayGunner.com and let them go. Best Products. Shipped Fast.