Tamiya Panel Line Accent Color 40ml Black TAM87131 Review (2026)

Ready to use, pre-thinned formula

Tamiya pre-dilutes this Panel Line Accent Color to what it calls the ideal viscosity for the job, so unlike a standard enamel paint that needs to be thinned by hand before a wash, this bottle is ready to apply straight out of the box. That pre-thinning is a meaningful convenience for a builder new to panel line washing, since getting a homemade wash mix too thick or too thin is a common early mistake that either fails to flow into lines or pools unevenly across a surface. The 40ml bottle also comes packaged compactly, weighing about 105 grams including packaging, so it stores easily alongside other small paint bottles on a shelf or in a tool box.

Brush in cap application

The bottle cap has a built in brush, letting the wash go directly from bottle to panel line without a separate brush, dish or dropper, which keeps the process fast for touching up a model's recessed detail lines across many small areas. This design suits the specific job of tracing into panel lines and rivets rather than broader painting, so builders should not expect this brush to double as a general purpose paintbrush for other tasks. The cap brush also makes it easy to reseal and reuse the bottle across many sessions without the tip drying out.

Why black works broadly

As a general purpose color, black creates strong contrast against most base coats, which is why it is a common starting choice for panel line washing on a wide range of subjects rather than a color chosen only for a specific paint scheme. On lighter base colors especially, black picks out recessed detail lines cleanly and adds a sense of depth and mechanical complexity to a kit's surface that a flat single color paint job lacks on its own, which is part of why this is one of the most reached for colors in Tamiya's panel line range and a common first bottle for builders new to weathering.

Enamel formula and plastic safety

This is an enamel based wash, meant to be applied over a base coat of lacquer or acrylic paint so the enamel does not react with or lift the layer beneath it, and any excess can be wiped away afterward using enamel thinner rather than water or standard cleanup solvents. Tamiya specifically warns that plastic parts can become brittle where this accent color is used, so it should be kept away from moving parts or load bearing joints where a compromised, brittle spot in the plastic could crack under stress over time.

Where it fits in a paint workflow

This wash belongs after the base coat and any decals are down but generally before a final protective clear coat, letting the panel lines darken and settle before being sealed in. Because the formula is pre-thinned and cleanup uses enamel thinner rather than the same solvents as the base paint, it is a distinct step in the workflow with its own material requirements, not something that can be mixed into an acrylic painting process without a plan for enamel specific thinner on hand for cleanup and mistakes. Keeping a small stock of cotton swabs on hand alongside the thinner makes wiping excess wash off flat surfaces much easier.

Frequently asked questions