How To Create A Custom Water Slide Decal Sheet For Your Kit

Custom water slide decals give a Gunpla build details that standard box art cannot provide. Unit numbers, warning labels, squadron emblems, sensors, and tiny maintenance markings can all be designed around your specific color scheme and fictional backstory.

The process is accessible with ordinary design software, decal paper, a printer, and careful surface preparation. The most important decisions happen before printing: selecting the right paper, checking image resolution, planning transparent areas, and testing how the colors will appear on your armor parts.

Plan The Artwork Around The Model

Begin by photographing or scanning the kit’s instruction markings, then measure the areas that will receive decals. A shoulder shield, rifle magazine, or calf armor may look large enough on screen but offer very little usable space in reality. Leave a small margin around every graphic so the carrier film can be trimmed cleanly.

Use a vector program when possible, since vector shapes remain sharp as you resize them. Raster software also works for painted emblems and complex artwork, provided the file is prepared at 300–600 dpi. Keep separate layers for symbols, text, outlines, and background colors so revisions remain manageable.

Create a page layout with repeated copies of important markings. Small decals can tear during application, and a spare is far more useful than restarting an entire print run. Arrange designs with enough space for scissors or a hobby knife to separate them without touching neighboring artwork.

Choose Paper And Printer Settings

Inkjet and laser printers require different decal media, so check the manufacturer’s instructions before buying. Inkjet sheets usually need a clear protective coat after printing because the ink can dissolve in water. Laser prints are generally more water-resistant, though their toner colors and white coverage may vary.

Clear decal paper is best for markings that should sit directly on painted armor. White decal paper is necessary for white lettering, pale symbols, or colors that must remain bright over dark blue, red, gray, or black parts. Remember that ordinary home printers do not print white ink; on clear paper, white areas become transparent.

A printer’s “photo” or “best quality” setting often produces stronger color density, but it can also lay down more ink than the film can handle. Print a small color test first, allow it to dry fully, and apply the recommended clear coat in several light passes.

Compare Clear And White Decal Film

The choice between clear and white media affects both the artwork and the trimming process. Clear film blends into a gloss surface, while white film preserves pale colors but leaves a visible rectangular edge unless it is cut very closely around the design.

Before committing to a full sheet, compare the printed sample against the actual painted part. A warm gray may appear nearly white on screen, while a yellow warning stripe can lose intensity over a dark primer. A quick test prevents an entire batch of decals from looking too faint.

Prepare The Print For Water

After printing, let the sheet rest according to the paper instructions. Spray clear varnish in thin, even coats from several angles, allowing each pass to dry before adding the next. Heavy wet coats can cause ink to run, wrinkle the film, or create a brittle surface that cracks during application.

Seal the whole printed area rather than spraying only the individual graphics. This creates a continuous carrier layer that can be cut into small pieces. Leave enough unprinted border around the sheet for handling, and avoid touching the coated surface while it cures.

For a useful reference on how builders evaluate markings, color balance, and finish quality, browse the community’s kit reviews before choosing a final decal style. Seeing how different builders handle surface detail can help you decide whether a dense military layout or a restrained anime-accurate approach suits your project.

Apply Decals Without Silvering

Paint the target parts with a smooth gloss finish before application. Water slide decals trap air over rough or matte paint, creating a cloudy outline known as silvering. Cut each marking close to its edge, but avoid slicing through the printed artwork or leaving sharp corners that may lift later.

Dip the decal in lukewarm water for several seconds, then place it on a damp paper towel. When the image begins to slide on its backing, position the paper beside the model and gently push the decal into place with a soft brush. Blot excess water with a cotton swab, rolling it across the surface rather than rubbing.

Micro Set can improve adhesion, while Micro Sol or a similar softening solution helps the film conform to panel lines and curved armor. Apply solvent sparingly and leave the decal untouched while it wrinkles and settles. Once everything is dry, protect the result with a clear topcoat matched to the desired finish.

Build A Repeatable Decal Workflow

Keep the original artwork file, printer settings, and color test together in a project folder. Record the paper brand, clear coat type, and application solutions used. This makes it easier to reproduce a successful marking set for another kit or correct a design without rebuilding the entire sheet.

Builders working on ambitious custom projects can document their experiments in the work-in-progress area, where feedback may reveal alignment problems or suggest better placement. A photo of the decal sheet beside the kit is especially useful when asking for advice.

Useful habits for future sheets include:

• Design extras for high-risk markings and tiny warning labels
• Test every major color over the actual armor paint
• Use clear film for dark artwork and white film for pale artwork
• Seal inkjet prints with several light coats before cutting
• Finish with a protective topcoat after all decals have cured

Once the sheet is complete, save a second copy with the artwork grouped by scale and unit. That personal library can become a valuable source of reusable insignia, serial numbers, and panel markings for future builds.

Share The Finished Result

A custom decal sheet becomes most valuable when its results are documented. Photograph the model under neutral lighting, include close-ups of curved surfaces and panel lines, and mention the paper, printer, sealing spray, and setting solutions used. These details help other builders repeat the process with fewer failed tests.

Post the finished kit in the Gundam Eclipse Display Case and include a picture of the unused decal sheet when possible. Sharing both the design and the completed application gives fellow hobbyists a practical reference for their own custom markings.