The Truth About Panel Lining: Myths and Misconceptions Debunked

Quick Answer

Many panel lining fears are overblown, but some warnings are real. The key is knowing which liner types are safe for bare plastic and which require a protective topcoat. Use the right product for your situation, and you can panel line with confidence.

Panel lining is one of the most transformative steps in model building, yet it's surrounded by half-truths and outright myths. From fears about melting plastic to claims that you must topcoat before every liner, misinformation can make beginners hesitant or lead them into bad habits.

Let's cut through the noise. We'll examine the most common panel lining myths, give you clear verdicts, and explain what's actually going on—so you can line your kits with confidence and avoid real pitfalls.

Myth: Panel Lining Always Melts Plastic

One of the most persistent fears is that any panel liner will melt or eat through your kit's plastic. The truth is more nuanced. Many panel liners, especially enamel-based ones, contain solvents that can weaken or craze bare plastic if applied heavily or left to pool. But that doesn't mean every liner is dangerous.

Water-based and alcohol-based liners are generally safe on bare plastic. Enamel liners, like Tamiya Panel Line Accent, are the ones that require caution. The risk isn't immediate melting; it's that the solvent can seep into stress points and cause brittleness over time. The safe practice is to apply a gloss topcoat before using enamel liners, or to use a gentler product on bare plastic.

• Always test on a spare runner or hidden area first.
• Avoid flooding the panel line with enamel liner—less is more.
• If you're unsure, use a water-based liner on bare plastic.

Myth: You Must Topcoat Before Panel Lining

Many modelers insist that a gloss topcoat is mandatory before any panel lining. That's not entirely true. The need for a topcoat depends on the liner you're using and the plastic's condition. If you're using a water-based liner or a Gundam Marker, you can often skip the topcoat without issue.

However, if you're using an enamel-based liner, a gloss topcoat is a smart safeguard. It creates a barrier between the solvent and the plastic, preventing potential damage. It also makes panel lines flow more smoothly and clean up easier. So while it's not universally required, it's a best practice for certain products.

• Water-based markers: no topcoat needed.
• Enamel wash: topcoat recommended.
• Gloss topcoat helps the liner flow and clean up.

Myth: Panel Lining Is Only for Experts

Panel lining is often seen as an advanced technique, but it's actually one of the most beginner-friendly ways to elevate a kit. With the right tools and a little patience, anyone can achieve crisp, clean lines. The key is choosing a product that matches your skill level and comfort.

For beginners, Gundam Markers are a great starting point. They're easy to control, require no cleanup, and are safe on bare plastic. The Gundam Marker EX line even offers metallic and pearl colors for creative accents. Once you're comfortable, you can experiment with washes and other techniques.

• Start with a fine-tipped marker for precision.
• Practice on a cheap kit or spare parts.
• Clean up mistakes with a cotton swab or eraser.

Myth: All Panel Liners Are the Same

It's easy to assume that any panel liner will give the same result, but that's far from true. Different liners have different viscosities, solvents, and pigment concentrations, which affect how they flow, how they dry, and how they interact with plastic.

Enamel washes are thin and flow into fine lines via capillary action, but they require careful cleanup and a topcoat. Water-based liners are safer but may need multiple coats for dark lines. Gundam Markers are convenient and come in a wide range of colors, but they can be less precise on tight corners. Choosing the right liner for your project is part of the craft.

• Enamel wash: best for fine, deep lines; requires topcoat.
• Water-based: safe on bare plastic; may need multiple coats.
• Gundam Marker: easy to use; good for beginners.

Panel Lining Myths: Verdicts

• Panel lining always melts plastic: False. Only certain enamel-based liners pose a risk, and only when used improperly. Water-based and marker liners are safe on bare plastic. Choose your liner based on your plastic and topcoat situation.
• Topcoat is always required before panel lining: False. It's only necessary for enamel washes. For water-based liners and markers, it's optional. Match your topcoat to your liner type.
• Panel lining is only for experts: False. With the right tools and a little practice, anyone can do it. Start with markers and work your way up. Start simple, and you'll build confidence quickly.

Products That Help

• Gundam Marker EX XGM302 - EX Pearl Gold: Pearl colors are now available in the Gundam Marker EX lineup. Since the color is greatly affected by the base color, you can enjoy a variety of expressions by adjusting the hue. This marker is a safe choice for panel lining on bare plastic, and the pearl gold adds a unique metallic accent that changes with your base coat—perfect for customizing your kit's details.
• High Grade (HG) HGUC 1/144 RX-105 Ξ Gundam (Xi Gundam) [The Sorcery of Nymph Circe]: This HG kit includes newly designed armaments, a selectable reproduction of the Gundam face head, a beam rifle barrel holder, a damaged shield, and manipulator wrists. A detailed kit like this benefits from panel lining to bring out its sculpted details. The included accessories give you plenty of surfaces to practice your lining technique.

Panel lining doesn't have to be intimidating. By understanding the real risks and benefits of different liner types, you can make informed choices that protect your kits and enhance their appearance. Whether you're a beginner or a seasoned builder, the truth about panel lining is simple: use the right product for your situation, and you'll get great results.