How to Make Custom Waterslide Decals at Home

Custom waterslide decals can add markings, warning labels, squadron symbols, and personalized graphics to any Gunpla project. Learning how to make your own waterslide decals using a home printer gives you more freedom than relying on the designs included with a kit, especially when recreating a specific mobile suit or original color scheme.

The process is affordable, but good results depend on choosing the right decal paper, preparing artwork at a useful resolution, and sealing printed ink before the sheet touches water. The method works for beginners, while careful calibration can produce results suitable for a detailed Display Case build.

You will need a printer, waterslide decal paper, clear acrylic spray or another compatible sealer, scissors or a hobby knife, tweezers, and setting solutions if available. A cutting mat, soft brush, cotton swabs, and gloss topcoat will also make the application cleaner.

Choose The Right Decal Paper

Waterslide paper is sold in versions designed for inkjet and laser printers, so match the paper to your equipment. Inkjet prints can dissolve when wet unless they receive several thin layers of clear sealant. Laser prints are generally more water-resistant, although the finished sheet still benefits from protection.

Clear decal paper is ideal for dark lettering or designs that need the model’s paint color to show through. White decal paper is better for bright symbols, pale text, and artwork placed over a dark surface. Since most home printers cannot print white ink, white paper supplies that missing background.

Before buying, check the recommended printer type, drying time, and sealing instructions. Some paper is thicker than commercial hobby decals, which can make edges more visible under a flat finish.

Prepare Artwork For Printing

Create the design in software that preserves precise dimensions, such as a vector editor, image editor, or even a carefully configured document application. Work at 300 dpi or higher for raster graphics, and measure the model’s panel or armor section before setting the decal size. Print a paper test first to confirm scale.

Leave a small margin around each marking so you can cut without damaging the printed edge. Arrange several designs on one sheet to reduce waste, but keep enough space between them for trimming. Mirroring is unnecessary for most symbols, though it matters for designs intended for the opposite side of a symmetrical part.

Strong contrast produces the most readable markings. Very fine lines may disappear after sealing and cutting, so simplify complex artwork when necessary. If you are preparing a full custom sheet, include spare copies of important symbols.

Printing And Sealing

Print on the glossy printable side of the decal sheet and select a high-quality or photo-paper setting if your printer offers one. Disable automatic scaling so the final dimensions remain accurate. Allow the ink to dry completely; several hours is safer than handling the sheet immediately.

Spray the printed sheet with two or three light coats of clear acrylic, waiting for each coat to dry. Heavy spraying can cause ink to run, wrinkle the paper, or create an uneven film. Work in a ventilated area and follow the product’s safety directions.

Cut And Apply The Decals

Cut each marking as close to the printed artwork as practical, especially when using white paper. A narrow transparent border can remain around a clear decal, but excessive film may show after topcoating. Use a sharp hobby knife for straight edges and small scissors for larger shapes.

Brush a little clean water onto the model or soak the decal in a shallow dish for roughly 10 to 30 seconds. When the design begins to slide from its backing, place it near the target area and move it gently with a damp brush. Avoid pulling on the printed film.

Blot away water with a cotton swab or folded tissue, rolling rather than dragging across the decal. A decal-setting solution can help it settle over panel lines, while a stronger softening solution may conform it to curves and rivets. Test these products on a spare marking first.

Prevent Silvering And Damage

Silvering is the cloudy or silvery outline that appears when air becomes trapped beneath clear decal film. A smooth gloss coat before application is the best defense. Cutting close to the artwork and pressing out excess water also reduces the problem.

Once the decal has dried, inspect the edges and apply another light gloss layer to protect it. Finish with a matte, satin, or gloss topcoat that matches the rest of the model. Matte finishes are useful for military-style mobile suits, while gloss can suit a polished custom build.

Handle the model carefully during every stage. Fresh decals can wrinkle, lift, or fingerprint easily, and aggressive rubbing may remove printed details. Let each coat cure fully before masking, weathering, or adding panel liner.

Build A Reliable Home Decal Workflow

Keep a digital folder containing original artwork, final-size files, and printer test versions. Record which paper, printer setting, and sealant produced the best result. This makes it easier to reproduce a marking later or correct a design without starting from scratch.

A small test strip can reveal problems with color, scale, adhesion, and transparency before you commit to a full sheet. Test over the same paint and topcoat used on the model because a decal can look different on white, gray, red, or metallic surfaces.

For timely community updates, kit discussions, and project notices, check the forum announcements before beginning a group build or themed submission.

Recommendations For Cleaner Results

Use these habits to make the process more predictable:

• Print several copies of fragile or important markings.
• Test transparent artwork over a painted spare part before applying it to the model.
• Seal inkjet prints with thin coats instead of one heavy spray.
• Apply decals over gloss paint and use a final topcoat after they cure.
• Photograph your finished work and record the materials used for future builds.

Custom decals are a practical way to give a standard kit a distinct identity, whether the goal is screen accuracy, weathered realism, or an entirely original mobile suit. Share your completed build, test sheet, or application results with the builders at Gundam Eclipse and turn each successful experiment into useful knowledge for the community.