How do I apply decals to a model?

Updated October 2026 · How we answer

Short answerTo apply decals, cut them out, soak in water, slide onto the model, and position. Use a decal setting solution to help them conform to curves and avoid silvering.

Preparation and Application

First, ensure the model's surface is glossy and clean. A glossy finish prevents air bubbles under the decal, which cause silvering. If your paint is flat, apply a clear gloss coat before decaling. Cut the decal from the sheet with scissors or a hobby knife, leaving a small border.

Soak the decal in lukewarm water for 10-20 seconds until it loosens from the backing paper. Slide it onto the model using a wet finger or tweezers. Position it with a brush or toothpick. Blot excess water with a soft cloth.

  • Apply a gloss coat before decaling.
  • Cut decals close to the design.
  • Soak in water until it slides easily.
  • Use setting solution for curved surfaces.

Setting Solutions and Sealing

Decal setting solutions, like Micro Sol or Tamiya Mark Fit, help the decal soften and conform to curves and panel lines. Apply a small amount under and over the decal. Don't touch it until it dries, as it becomes fragile. For stubborn decals, use a stronger solution like Solvaset.

After decals are dry, seal them with a clear coat (gloss, semi-gloss, or flat) to protect them and blend with the model's finish. This also prevents them from peeling off over time.

Common mistakes

  • Applying decals to a flat finish can cause silvering; always use a gloss coat first.
  • Moving decals after they start to set can tear them.
  • Using too much setting solution can damage the decal; use sparingly.