Quality Tools & Supplies for Hobbys, DIY & Crafts - Micro-Mark Tools

Micro-Mark Air Airbrush Thinner, 20ml

Micro-Mark Air Airbrush Thinner, 20ml - Main image
$2.45 $3.95 In stock

Category: Thinners


Micro-Mark acrylics spray smoothly through an airbrush right out of the bottle, but for fine detail, thin coats, or high-flow applications, thinning is essential. Use the 20ml Airbrush Thinner to customize the flow and performance of your airbrush-ready paints.

  • Designed specifically for thinning water-based acrylics for airbrushing
  • Enhances atomization for smoother, more even spray patterns
  • Maintains color vibrancy while improving flow and reducing tip dry
  • Slows drying slightly to reduce clogging and overspray
  • Made in the USA

Description

Micro-Mark Airbrush Thinner is formulated to work with our acrylic paint line and other water-based hobby paints. It ensures reliable spray performance, even through fine nozzles and at low PSI. This thinner improves atomization, reduces dry-tip buildup, and allows for smoother transitions, perfect for gradients, preshading, or modulation. Use it to adjust paint viscosity depending on the scale, surface, and detailing needs.

Micro-Mark Airbrush Thinner is included in these sets:
Item #29421 Essentials Acrylic Paint Set

Airbrush Railroad Acrylic Paint Set

Item #29270 Basic Airbrush Acrylic Paint Set

Modeling Use Cases

• Miniatures: Spray fine skin tones, highlights, or shadow transitions
• Armor & Vehicles: Use for preshading, panel fading, and modulation
• Model Trains: Evenly coat structures, rolling stock, or weathering effects
• Terrain & Dioramas: Thin paint for subtle earth tones, fog layers, or atmosphere
• Sci-Fi/Fantasy: Apply glow effects, translucent filters, or battle damage

How to Use Micro-Mark Airbrush Thinner

  1. Prepare Your Paint
    • Pour paint into a separate mixing cup—never thin directly in the bottle.
    • Add thinner gradually: Start with a 3:1 paint-to-thinner ratio (or adjust as needed).
    • Mix thoroughly with a stir stick or pipette until smooth and lump-free.
  2. Test Spray First
    • Spray on a test surface to check consistency, spray pattern, and coverage.
    • Adjust PSI (typically 15–25) and thinner ratio to suit your nozzle and effect.
  3. Spray Your Model
    • Use sweeping motions and build up in thin layers.
    • The thinner helps eliminate spatter and clogs while improving fine control.
  4. Clean Your Airbrush
    • Rinse with water first, then flush with Airbrush Thinner or Micro-Mark Airbrush Cleaner.
    • Disassemble and clean nozzle if buildup is visible.

Tips for Best Results

• Don’t exceed 1:1 ratio unless aiming for very transparent effects.
• Use with a gravity-feed or dual-action airbrush for maximum control.
• Shake thinner well before use.
• Store thinned paint only short-term to avoid pigment separation.

Micro-Mark Airbrush Thinner is also available in a larger 8 oz size.

Before you pay

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.0 / 5 · 5 reviews)

Charlotte E. ★★★★★

I was skeptical that a tiny 20ml bottle would make a difference, but one drop of this thinner and my detail lines finally stopped sputtering mid-stroke. The flow control it gives is just right for those thin, high-flow passes without wrecking the pigment.

Sophia ★★★★☆

The smaller 20ml bottle is perfect for my workbench since I don't use much thinner at a time. It mixed evenly with my acrylics and kept the nozzle from clogging during a long detailing session. Only wish the bottle had a dropper tip for easier measuring.

George ★★★★☆

I’ve been using this thinner with my airbrush for fine lines, and it mixes well without clogging the tip. The 20ml bottle is enough for a few projects.