Introduction
The Micro-Mark Brush-On Thinner is a professional-grade solution designed to adjust the consistency of water-based acrylic paints for smooth application in model painting and crafting. This 8 oz bottle provides a reliable method for achieving desired paint flow and effects.

Image: Front view of the Micro-Mark Brush-On Thinner 8 oz bottle.
Safety Information
CAUTION: Eye Irritant. Avoid contact with eyes. In case of contact, flush thoroughly with water. Keep out of reach of children. Use in a well-ventilated area. Shake well before use.

Image: Back label of the thinner bottle, displaying safety information and usage instructions.
Setup and Preparation
- Shake Well: Before each use, shake the bottle thoroughly to ensure the thinner is properly mixed.
- Prepare Your Workspace: Ensure your work area is clean, well-lit, and adequately ventilated. Protect surfaces from spills.
- Gather Materials: Have your water-based acrylic paints, brushes or airbrush, mixing palette, and a clean container for thinning ready.

Image: The Micro-Mark Thinner bottle positioned next to a model structure and small measuring cups, indicating preparation for use.
Operating Instructions
This thinner is designed for use with water-based acrylic paints to achieve optimal consistency for various painting techniques.
1. Thinning for Brush Application
- Dispense Paint: Place a small amount of your acrylic paint onto a mixing palette.
- Add Thinner: Using the precision dispensing cap, add a few drops of Micro-Mark Brush-On Thinner to the paint. Start with a small amount and add more gradually.
- Mix Thoroughly: Mix the paint and thinner using a brush or stirring tool until the desired consistency is achieved. The goal is a smooth, even flow without excessive transparency.
- Test: Before applying to your model, test the thinned paint on a scrap piece to ensure the consistency and coverage are as desired.

Image: Thinner being carefully dispensed into a small measuring cup.

Image: A brush mixing paint with thinner on a small palette to achieve desired consistency.
2. Thinning for Airbrush Application
While primarily a brush-on thinner, it can be used to adjust acrylics for airbrushing. However, specific airbrush thinners may offer superior performance for very fine atomization.
- Initial Thinning: Begin by thinning your acrylic paint as described for brush application, aiming for a milk-like consistency.
- Further Adjustment: If needed, add more thinner in very small increments until the paint flows smoothly through your airbrush without clogging.
- Test Spray: Always test spray on a scrap surface to verify proper atomization and flow before applying to your final project.

Image: A brush applying thinned paint to the textured surface of a model, demonstrating smooth coverage.
Product Overview Video
Video: An overview of the Micro-Mark Acrylic Paint Thinner, demonstrating its use and benefits for model painting. This video is provided by Maker Source.
Maintenance and Storage
- Cap Tightly: Always replace the cap securely after each use to prevent evaporation and contamination.
- Store Properly: Store the thinner in a cool, dry place, away from direct sunlight and extreme temperatures.
- Clean Tools: After thinning and painting, clean your brushes and airbrush immediately with water or appropriate cleaning solutions to prevent paint from drying and hardening.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Paint is too thick after thinning. | Insufficient thinner added. | Add thinner in small increments and mix thoroughly until desired consistency is reached. |
| Paint is too thin or transparent. | Too much thinner added. | Add more unthinned paint to the mixture to increase opacity and thickness. |
| Thinner does not work with enamel paints. | Product is specifically for water-based acrylics. | This thinner is not compatible with enamel paints. Use an appropriate thinner designed for enamel paints. |
| Paint dries too quickly on brush/airbrush. | Environmental factors (heat, low humidity) or paint type. | Work in a cooler, more humid environment if possible. Consider using a paint retarder if drying speed is a persistent issue. |
Specifications
- Brand: Micro-Mark
- Model Name: Brush-on Thinner
- Item Model Number: 29265
- Size: 8 Fl Oz (Pack of 1)
- Item Volume: 200 Milliliters
- Paint Type Compatibility: Acrylic (Water-based)
- Special Feature: Non Toxic
- Item Form: Liquid
- Indoor/Outdoor Usage: Indoor
- Product Dimensions: 2 x 2 x 6 inches
- Item Weight: 9.6 ounces
- UPC: 810096457851
Warranty and Support
Specific warranty information for this product is not provided in the available documentation. For product support, inquiries, or further assistance, please contact Micro-Mark customer service directly or visit their official website.
Manufacturer: Micro-Mark
Website: www.micromark.com

