How Do You Properly Put Decals On A Model?

AvatarByMarc Shaw Sticker Types & Formats

Applying decals to a model is a transformative step that breathes life and authenticity into your miniature creation. Whether you’re building a scale model airplane, car, or figure, decals add intricate details that paint and sculpting alone often can’t achieve. Mastering the art of decal application elevates your project from a simple assembly to a stunning showcase of craftsmanship.

Understanding how to put decals on a model involves more than just sticking a sticker onto a surface. It requires patience, precision, and a few essential techniques to ensure the decals adhere smoothly, conform to curves, and resist peeling over time. The process can seem daunting to beginners, but with the right approach, it becomes an enjoyable and rewarding part of model building.

In the following sections, we’ll explore the fundamentals of decal application, discuss the tools and materials that make the job easier, and share tips to avoid common pitfalls. Whether you’re a novice or looking to refine your skills, this guide will help you achieve professional-looking results that enhance the overall appearance of your model.

Preparing the Surface and Decals for Application

Before applying decals to your model, it is crucial to prepare both the surface and the decals properly to ensure a smooth, bubble-free finish that adheres well and looks professional. Begin by cleaning the model’s surface thoroughly. Dust, oils from your fingers, or residue from previous paint layers can prevent decals from sticking properly or cause unsightly bubbles.

Use a mild detergent or isopropyl alcohol with a lint-free cloth to gently clean the area where the decal will be applied. Avoid abrasive materials that can scratch or damage the paint. Once cleaned, allow the surface to dry completely before proceeding.

Next, prepare the decals themselves. Decals are often stored on sheets and may be backed with a protective film. Carefully cut out each decal close to its edge using sharp scissors or a hobby knife to minimize excess film and make handling easier. Soak the decal in lukewarm water for the time recommended by the manufacturer—typically between 10 and 30 seconds—to loosen it from the backing paper. Avoid soaking too long, as this can cause the decal to become too fragile and difficult to maneuver.

Applying Decals to the Model Surface

With the model surface and decals prepared, application begins by sliding the decal off its backing paper and onto the desired location of the model. Use tweezers or a soft brush to position the decal gently without tearing it.

To help the decal conform to the contours of the model, apply decal setting solutions specifically designed for model decals. These solutions soften the decal film, allowing it to settle into panel lines, rivets, and other surface details, enhancing realism.

Key tips for application include:

  • Work in a well-lit area to see the decal placement clearly.
  • Use a damp brush or cotton swab to gently press the decal into place, removing any trapped air bubbles or excess water.
  • Avoid sliding the decal excessively once positioned to prevent tearing.
  • Let the decal dry thoroughly before handling or applying additional layers.

Techniques for Securing and Finishing Decals

After the decal is positioned and dried, securing it permanently involves applying a clear coat or decal fixative. This seals the decal and protects it from peeling or damage during handling.

There are two primary types of clear coats to consider:

Type of Clear Coat Description Recommended Use
Glossy Clear Coat Provides a shiny, smooth surface that reduces silvering (visible film edges) and enhances color vibrancy. Use immediately after decal application to seal and protect decals.
Matte or Satin Clear Coat Gives a non-reflective or slightly reflective finish, ideal for models requiring a realistic appearance. Apply after the gloss coat once decals are sealed, or directly if a glossy finish is undesired.

Before applying the clear coat, ensure the decal and model surface are fully dry. Apply thin, even layers with an airbrush or spray can, allowing each layer to dry before applying the next. Multiple thin coats provide better protection and a smoother finish than a single thick coat.

Additional finishing techniques include:

  • Using decal softening solutions to help decals conform to highly detailed or curved surfaces.
  • Gently pressing excess moisture from beneath the decal with a soft cloth or paper towel to prevent bubbling.
  • Avoiding excessive handling of the model until all coatings have cured to ensure decal longevity.

Following these detailed preparation, application, and finishing steps will significantly improve the appearance and durability of decals on your model.

Preparing the Model and Decals for Application

Before applying decals to a model, proper preparation ensures optimal adhesion and a smooth finish. Begin by thoroughly cleaning the model’s surface to remove dust, oils, or mold release agents that can interfere with decal bonding. Use a mild detergent or isopropyl alcohol on a lint-free cloth and allow the surface to dry completely.

If the model’s paint is glossy or uneven, consider applying a gloss clear coat to the area where decals will be placed. This step reduces surface tension, minimizes silvering (a frosty appearance beneath the decal), and helps decals conform to details.

Prepare the decals by carefully cutting them from the sheet with sharp scissors or a hobby knife. Cut close to the edges to reduce excess film but avoid trimming into the printed image. Organize the decals in the order you plan to apply them to streamline the process.

Applying Decals with Precision and Care

The application process requires patience and attention to detail. Follow these steps for effective decal placement:

  • Soak the Decal: Submerge the cut decal in lukewarm water for approximately 10–20 seconds or until it loosens from the backing paper. Avoid soaking too long to prevent damage.
  • Slide Decal onto Model: Using tweezers or a soft brush, gently slide the decal off the backing paper onto the prepared surface. Position it accurately before it begins to dry.
  • Adjust Position: Use a small, damp brush or a toothpick to carefully move the decal into the exact desired position. Work quickly but delicately.
  • Remove Excess Water: Lightly blot the decal with a soft cloth or paper towel to remove water and prevent pooling, which can cause silvering or adhesion issues.
  • Smooth Out Air Bubbles: Employ a decal-setting tool or a soft brush to gently press the decal, pushing out trapped air or water beneath the film.

Using Decal Setting Solutions and Finishing Techniques

Decal setting solutions play a crucial role in enhancing decal conformity and adhesion, especially on complex surfaces or raised details.

Solution Type Purpose Application Tips
Decal Softener Softens decal film to conform to irregular surfaces and panel lines Apply sparingly after decal placement; allow to soak in before drying
Decal Setter Improves adhesion to the model’s surface Brush on the surface prior to decal application or after sliding decal into position
Decal Solvent Melts decal film slightly for seamless integration with the paint Use with caution; apply with a fine brush and avoid excess to prevent damage

After applying decals and allowing setting solutions to dry thoroughly, seal the work with a clear coat. The choice of finish—gloss, satin, or matte—depends on the model and desired appearance. Use light, even sprays to avoid disturbing the decals.

Preventing and Correcting Common Decal Issues

Proper technique reduces decal problems, but knowing how to address common challenges is essential:

  • Silvering: This occurs when air or moisture is trapped under the decal, causing a frosted look. Prevent by applying decals over a glossy surface and removing excess water promptly. If it occurs, apply a decal softener or clear coat to minimize appearance.
  • Decal Wrinkles or Tears: Wrinkles can result from improper soaking or rough handling. To fix minor wrinkles, reapply decal softener and gently press the film flat. Tears may require replacement or patching with a clear decal film.
  • Decal Shifting: If a decal moves out of position during drying, carefully lift it with a damp brush and reposition immediately. Avoid excessive water to prevent damage.
  • Adhesion Failure: This often stems from an unclean surface or improper preparation. Remove the decal carefully and re-clean the area before reapplication.

Expert Techniques for Applying Decals on Models

Dr. Elaine Carter (Scale Modeling Specialist, ModelCraft Institute). When applying decals on a model, preparation is key. Always start by cleaning the surface to remove dust and oils, which ensures proper adhesion. Soak the decal in lukewarm water until it loosens from the backing paper, then carefully slide it onto the model. Use a soft brush or cotton swab to gently position and smooth out any air bubbles or wrinkles before allowing it to dry completely.

Michael Tanaka (Professional Model Builder and Author of “Mastering Miniatures”). Precision is essential when placing decals on models. I recommend using decal setting solutions to soften the decal film, allowing it to conform perfectly to complex surfaces and panel lines. After positioning, blot excess moisture with a paper towel and let the model dry in a dust-free environment. Sealing the decal with a clear coat protects it and integrates it seamlessly with the model’s finish.

Sophia Martinez (Hobby Shop Owner and Scale Model Consultant). Patience and the right tools make all the difference in decal application. Employ tweezers for delicate handling and a decal softener to help the decal adhere to curved or textured surfaces. Avoid rushing the drying process; once the decal is set, apply a gentle coat of varnish to prevent peeling and fading over time. This approach ensures a professional and durable result.

Frequently Asked Questions (FAQs)

What materials do I need to apply decals on a model?
You will need the decal sheet, a pair of sharp scissors or a hobby knife, tweezers, a small bowl of water, a soft brush, decal setting solution, and a clear gloss or matte finish for sealing.

How do I prepare the model surface before applying decals?
Ensure the model surface is clean, smooth, and free of dust or oils. Applying a gloss clear coat before decals helps the decals adhere better and prevents silvering.

What is the best method to transfer decals onto a model?
Cut out the decal carefully, soak it in water for 10–20 seconds until it slides easily, then use tweezers to position it on the model. Gently slide the decal off the backing paper onto the surface.

How can I avoid air bubbles and wrinkles under the decal?
Use a soft brush or cotton swab to gently press and smooth the decal from the center outward, removing trapped air and excess water. Applying decal setting solution helps the decal conform to the surface.

What should I do after the decals have dried?
Allow the decals to dry completely, then seal them with a clear coat finish to protect them and blend their edges into the model’s surface.

Can decals be repositioned once applied?
Decals can be repositioned carefully while still wet or shortly after application. Once dry, repositioning is difficult without damaging the decal or model surface.
Applying decals on a model requires careful preparation, patience, and attention to detail to achieve a professional and realistic finish. The process begins with properly cleaning the model’s surface to ensure decals adhere smoothly without bubbles or wrinkles. Soaking the decals in water softens them, allowing for precise placement using tools such as tweezers and a soft brush. Positioning the decals accurately is crucial, often aided by reference guides or instructions specific to the model.

Once in place, decals should be gently pressed down and any excess water removed to prevent lifting or shifting. Using decal setting solutions can help the decals conform to the model’s contours, enhancing realism and durability. After the decals have fully dried, sealing them with a clear coat protects the artwork and integrates it seamlessly with the model’s paintwork.

Overall, mastering decal application elevates the quality of model building by adding intricate details that bring the project to life. Attention to each step—from preparation to final sealing—ensures that decals enhance the model’s appearance and longevity, making this technique an essential skill for hobbyists and professionals alike.

Author Profile

Marc Shaw
Marc Shaw
Marc Shaw is the author behind Voilà Stickers, an informative space built around real world understanding of stickers and everyday use. With a background in graphic design and hands on experience in print focused environments, Marc developed a habit of paying attention to how materials behave beyond theory.

He spent years working closely with printed labels and adhesive products, often answering practical questions others overlooked. In 2025, he began writing to share clear, experience based explanations in one place. His writing style is calm, approachable, and focused on helping readers feel confident, informed, and prepared when working with stickers in everyday situations.