How to Clean an Airbrush Between Color Changes
By Newtype: Gundam Model Kits / Gunpla / Paint / Tools | Published: 2026-10-15
Category: How-to Guides
A practical, step-by-step routine for flushing acrylic paint from your airbrush between colors, including nozzle cleaning and when to use a water-soluble brush cleaner.
Quick answer
Flush the cup with the same thinner or water base as your paint, spray until the stream runs clear, then back-flush and wipe the nozzle. For acrylics, a water-soluble cleaner such as Gaia Brush Clean & Rinse T-10s 250ml lets you rinse brushes and flush residue without a harsh solvent, so color changes stay quick and your next coat stays clean.
Why a consistent paint change routine matters
Paint left in the nozzle or cup dries into a film that blocks flow and spatters the next color. The goal between colors is not a full teardown; it is removing wet paint before it sets. A repeatable flush keeps your airbrush maintenance predictable and protects the finish on your Gunpla.
Water-based acrylics like Kaleido ColorWorks K103 Gloss Bright Yellow dry faster than solvent paints, so the window to flush is shorter. Work in small batches and clean as soon as you stop spraying.
What to keep at the bench
Set up a cleaning station before you start painting: a jar of the thinner or water that matches your paint, paper towels or lint-free cloths, cotton swabs, a small cleaning brush, and a dedicated rinse container. Keeping these within reach removes the temptation to skip a step.
For water-based acrylics, Gaia Brush Clean & Rinse T-10s 250ml is a water-soluble option for washing brushes and rinsing tools. It is not a replacement for matching thinner in the cup, but it simplifies cleanup of the brush and any residue on your work surface.
Step-by-step airbrush cleaning between colors
- Dump and wipe the cup: Pour leftover paint into a waste jar, then wipe the cup walls with a paper towel. Do not spray the leftover paint through the airbrush; it wastes paint and pushes pigment deeper into the nozzle. Checkpoint: the cup should look mostly empty before you add any cleaner.
- Flush with matching thinner or water: Add a small amount of the thinner or water that matches your paint, swirl, and spray into a waste container until the stream runs clear. For water-based acrylics, water alone may leave residue, so follow with a dedicated cleaner if needed. Checkpoint: if the spray still shows color, repeat with fresh thinner before moving on.
- Back-flush to clear the nozzle: Cover the nozzle with a cloth or your finger and gently press the trigger to force air back through the cup. This lifts paint sitting in the nozzle passage. Do this over the waste container, not over your model. Checkpoint: bubbles in the cup mean the back-flush is working; stop if liquid overflows.
- Clean the nozzle and needle: Remove the nozzle cap and use a small cleaning brush or cotton swab dampened with cleaner to wipe the nozzle tip and needle. Do not jam a needle into the nozzle; you can bend the tip and ruin the spray pattern. Checkpoint: inspect the nozzle opening against a light; any visible ring of dried paint needs another pass.
- Rinse the brush and tools: If you used a brush to loosen dried paint, wash it with Gaia Brush Clean & Rinse T-10s 250ml or your usual brush cleaner, then rinse and reshape the bristles. Clean tools now save you from dried bristles later. Checkpoint: a clean brush should not release color when you rinse it under water.
- Do a test spray before the next color: Spray a quick burst of the new color onto scrap cardboard or paper. If the spray is uneven or sputters, repeat the flush step before painting your model. Checkpoint: a smooth, even test spray means you are ready to paint.
Product facts
- Gaia Brush Clean & Rinse T-10s 250ml: Gaia Brush Clean & Rinse T-10s 250ml is a water-soluble cleaner designed for washing brushes used in modeling and painting. Because it is water-soluble rather than solvent-based, you can rinse brushes and tools at the sink without harsh fumes, making it a practical part of a between-color cleanup routine.
- Kaleido ColorWorks K103 Gloss Bright Yellow (20ml): Kaleido ColorWorks K103 Gloss Bright Yellow (20ml) is a water-based acrylic from Gaahleri's RapidAir Series, formulated to spray in a smooth, sheet-like layer and reduce beading, uneven coverage, and sagging. Water-based acrylics dry quickly, so the flush step between colors needs to happen promptly to prevent dried film in the nozzle.
- GPaint GP-007 Gun Metal 65ml: GPaint GP-007 Gun Metal 65ml is designed to be used without a primer and without mixing a paint-to-thinner ratio. Because there is no thinner ratio to manage, you can focus your between-color routine on flushing the airbrush rather than adjusting paint consistency.
