Gunpla Panel Lining Guide for Beginners: Make Your Gundam Kits Look Incredible

If you’ve just finished your first Gunpla kit and felt like something was missing — like the details weren’t really popping the way you see in photos online — the answer is almost certainly panel lining. This single technique transforms a straight-built kit from looking like a toy into looking like a detailed mecha model, and the best part? It’s beginner-friendly, affordable, and you can do it in an afternoon. In this guide, we’re going to walk you through everything you need to know about Gunpla panel lining, from choosing the right tools to nailing the technique — all without ruining your kit in the process.

What Is Panel Lining and Why Does It Matter?

Panel lining is the process of drawing fine dark lines into the recessed grooves and engraved details on your Gunpla parts. These grooves represent the panel joins and mechanical details of the mobile suit — places where armour plates meet, where vents are cut, where mechanical structure lines run across the surface.

Out of the box, these grooves are there, but they’re subtle. Panel lining makes those shadows visible by filling the recesses with ink, giving the illusion of depth and making each part look like it consists of multiple smaller pieces. The result is a model that looks significantly more detailed and realistic — even without any paint spraying or airbrush work at all.

For Malaysian hobbyists who are just getting into Gunpla and don’t yet have an airbrush setup, panel lining is the single highest-impact technique you can apply to a fresh out-of-box (OOB) build. The materials cost less than RM30 and the results are dramatic.

Choosing the Right Panel Lining Tools

Gundam Marker (Pour Type) — Best for Beginners

The Gundam Marker Pour Type (also called flow-type or lining type) is specifically designed for panel lining. You press the nib against the kit’s recessed groove, and the ink flows by capillary action, spreading along the line automatically. It looks almost magical the first time you try it.

These markers come in three colours most useful for beginners: GM301 Black (for dark parts), GM302 Gray (for white and light parts — gives a subtler, more realistic look), and GM303 Brown (for red, orange, and warm-coloured parts). Mistakes are corrected with a rubber eraser once the ink has fully dried. This method is forgiving, easy to use, and produces clean results without any mixing. It’s available directly at Gundam.my’s panel lining accessories section.

Enamel Wash — For a More Realistic Result

An enamel wash involves thinning enamel paint with enamel thinner to a very watery consistency, then flowing it into the panel lines with a fine brush. Once dry, you wipe the excess off flat surfaces with a cotton swab soaked in enamel thinner — leaving ink only in the recesses. This produces a natural, weathering-style effect. However, enamel thinner can crack bare plastic, so always apply a gloss top coat first before attempting an enamel wash. This protective lacquer layer prevents the thinner from attacking the plastic underneath.

Mechanical Pencil — The No-Risk Option

A 0.3mm pencil with soft 2B or 4B lead drawn into the grooves deposits graphite into the recesses safely, with no drying time and easy erasing. The lines look lighter than a proper marker but it’s a great zero-risk starting point.

Step-by-Step: How to Panel Line with a Gundam Marker

Here’s the exact process for beginners using the Gundam Marker Pour Type:

1. Build your kit first — panel lining is done on assembled or partially assembled parts, not on the runner.
2. Choose your colour — pick gray for light/white parts, black for dark parts, brown for warm-toned parts.
3. Press the tip into the groove — hold the marker lightly like a pen and touch the nib to where a panel line starts. The ink will flow along the groove automatically. Don’t press hard — you’re just touching it to start the flow.
4. Let it dry — wait at least 3–5 minutes. Don’t rush this step. If the ink is still wet when you try to clean it, you’ll smear it everywhere.
5. Erase the excess — use a clean rubber eraser or a cotton swab to gently wipe the flat surfaces surrounding the panel line. Rub perpendicular to the line to push the ink back into the groove rather than pulling it out. Work in small areas at a time.
6. Repeat for all grooves — methodically work through every panel line on each part. Take your time; rushing leads to smears.

Choosing the Right Colour for Each Part

This is where a lot of beginners go wrong — they use black panel lining ink on everything, including white parts. This can make the kit look over-contrasted and artificial. A simple rule to follow:

• White and light grey parts → use grey panel liner (GM302)
• Blue, dark grey, green, black parts → use black panel liner (GM301)
• Red, orange, yellow, brown parts → use brown panel liner (GM303)

When you use a colour that’s only slightly darker than the part itself, the shadows look natural. When you go too dark, it looks like someone drew on your kit with a marker — because they did. Subtlety is the key to making panel lining look professional.

Common Mistakes to Avoid

Even experienced builders run into these issues, so keep these in mind from the start:

• Wiping too early — if the ink is still wet, wiping spreads it across the surface in a stain. Always let it dry fully before cleaning up.
• Pressing too hard with the eraser — aggressive erasing can dull the plastic surface or leave scratch marks. Use light, gentle strokes.
• Panel lining on a glossy surface without sealing — if you’re using an enamel wash (not a Gundam marker), always apply a gloss top coat first. This protects the plastic and makes cleanup much easier since the ink won’t grip the flat surface.
• Using the same colour everywhere — as mentioned above, matching ink colour to part colour makes a huge difference.
• Skipping the cleaning step — leaving ink that’s strayed outside the lines will make the kit look dirty rather than detailed.

Sealing Your Work with a Top Coat

Once you’ve panel lined your kit, consider applying a matte top coat (like Mr. Top Coat Flat or Mr. Super Clear Flat) over the finished build. This does two things: it seals and protects the panel lines so they don’t rub off over time, and it removes the slightly toy-like plastic sheen from the kit’s surface, replacing it with a flat, realistic finish.

A matte top coat is the single finishing step that makes the biggest visual difference after panel lining. Spray it in a well-ventilated area, hold the can about 20–25cm from the kit, and apply in thin, even passes. Don’t spray in humid or wet weather — you’ll get a milky “frosting” effect that’s very hard to fix.

Where to Get Panel Lining Tools in Malaysia

Gundam.my stocks the full range of Bandai Gundam Marker Pour Type panel liners (GM301 Black, GM302 Gray, GM303 Brown) along with beginner-friendly accessories sets. If you’re just starting out, grab all three colours — they’re inexpensive and you’ll use them on virtually every kit you build from this point forward. You can also pick up the Tamiya Panel Line Accent Colour range for an easy, pre-mixed enamel wash option once you’re ready to try that method.

Start with a simple HG kit — something you’re happy to practice on — and you’ll be amazed at the transformation panel lining makes.

🛒 Shop Panel Lining Tools at Gundam.my