How to Use GM301 Black Liner Pour Type Gundam Marker

By Panda Hobby - Canada's Largest Gundam Store | Published: 2026-10-27

Category: How-to Guides

Learn how to use the GM301 Black Liner Pour Type Gundam Marker for clean panel lines on your Gunpla. This guide covers preparation, application, and cleanup tips.

Quick Answer

The GM301 Black Liner Pour Type Gundam Marker uses capillary action to flow ink into panel lines. Tap the tip on paper to release ink, then touch it to the groove—the ink will spread on its own. Clean up excess with an eraser or the GM300 Eraser Pen.

Why Use a Pour Type Marker?

The GM301 Pour Type is designed for speed and consistency. Unlike fine-tip markers that require you to trace each line, the pour type lets gravity and capillary action do the work. This makes it ideal for large kits with many panel lines, but it also means you need to control the ink flow carefully to avoid flooding the surface.

What You'll Need

Besides the GM301 marker, have a piece of scrap paper, a cotton swab or tissue, and an eraser or the GM300 Gundam Marker Eraser Pen on hand. Work in a well-ventilated area and let the ink dry completely before handling.

Step-by-Step Guide

Prepare the Marker: Shake the GM301 marker well. Remove the cap and gently tap the tip on a piece of scrap paper until you see a small amount of ink appear on the tip. Do not press hard—just a light tap is enough. Common mistake: tapping too hard can release too much ink, causing flooding.
Apply Ink to Panel Lines: Touch the inked tip to the start of a panel line groove. The ink will flow into the line by capillary action. Move the tip along the groove if needed, but let the ink do most of the work. Work on one section at a time. Checkpoint: If ink spreads outside the line, you applied too much. Wipe the tip on paper to reduce flow.
Let the Ink Dry: Allow the ink to dry completely—usually 5–10 minutes. Do not touch or smudge the lines during this time. Drying time may vary with humidity and plastic type. Common mistake: rushing to clean up before the ink is dry can smear it and ruin the line.
Clean Up Excess Ink: Use a soft eraser or the GM300 Gundam Marker Eraser Pen to gently remove any ink that bled onto raised surfaces. For stubborn spots, lightly dampen a cotton swab with isopropyl alcohol and wipe carefully. Checkpoint: Do not use abrasive tools—they can scratch the plastic.
Seal the Marker: After use, wipe the tip clean with a tissue and replace the cap firmly. Store the marker horizontally or tip-down to keep the ink flowing for the next use. Common mistake: leaving the cap off dries out the tip, making the marker unusable.

Product Details

GM301 Black Liner (Pour Type) Gundam Marker: Gundam Marker Pour Type Black GM301 – just knock the pen tip on a piece of paper, moisten it with ink, and then apply the pen tip to the mold. It flows smoothly into the mold and can be smeared. This means you don't need to trace each line—the ink flows into grooves automatically, saving time on complex kits.
GM301 Black Liner (Pour Type) Gundam Marker