🎨Guide model paint thinning ratio by paint type and application method

Select paint type and application method to get the recommended thinning ratio.

Recommended Ratio-
Thinner to Use-
Tips-

How to Thin Model Paint Correctly

Proper thinning is critical for a smooth finish. Paint that is too thick clogs the airbrush or leaves heavy brush marks; too thin and the color becomes transparent and may run. The correct ratio varies by paint type, application method, temperature, and humidity, so treat these ratios as starting points and adjust as you work.

For airbrushing, ideal viscosity is similar to skim milk — thin but not watery. A quick test: dip a toothpick in and watch how the paint flows off. A thin, steady stream is correct. Lacquers dry fast from solvent evaporation, so add a few more drops of thinner during longer sessions as the paint in your cup thickens. Water-based acrylics are beginner-friendly — low fumes, easy water cleanup, and forgiving to use.

Frequently Asked Questions

What happens if I thin paint too much?

The paint becomes transparent, loses coverage, and may run on vertical surfaces. Add a small amount of undiluted paint to restore the correct consistency.

How do I clean an airbrush after using lacquer?

Flush with dedicated lacquer thinner or Mr. Leveling Thinner immediately after use. Remove and soak the nozzle and needle in thinner for stubborn buildup.

Is primer (surfacer) thinned the same way?

Yes. For airbrushing, thin primer the same as lacquer: paint 1 : thinner 1–1.5. Properly thinned primer fills small scratches and provides a smooth base coat.