How to Smooth 3D Prints for Painting Using Rustoleum Textured Spray Paint and Filler Primer

When it comes to painting 3D prints for cosplay or display, achieving a smooth and polished surface is crucial. One effective method involves using Rustoleum Textured Spray Paint combined with Rustoleum Sandable Filler and Primer. This process creates a durable and even finish that enhances the final paint job. In this guide, we’ll walk you through the step-by-step process of smoothing your 3D prints with this method.

Materials Needed

  • Rustoleum Textured Spray Paint
  • Rustoleum Sandable Filler and Primer
  • 150-grit sandpaper
  • 600-grit sandpaper
  • A well-ventilated spray area (preferably outdoors or in a spray booth)
  • Protective gear (gloves, mask, and safety glasses)
  • Paper towels or a rag
  • Sanding block (optional)

Step-by-Step Process

Step 1: Preparing Your 3D Print

Before applying any spray paint or primer, ensure your 3D print is free of dust and debris. If necessary, lightly sand any sharp edges or support marks with 150-grit sandpaper to remove imperfections. Wipe the print clean with a dry cloth or paper towel.

Step 2: Applying Rustoleum Textured Spray Paint

Rustoleum Textured Spray Paint serves as the base layer, helping to fill layer lines and create a solid surface for sanding. Follow these steps:

  1. Set up your work area in a well-ventilated space, preferably outdoors or in a spray booth, to handle the high overspray.
  2. Shake the can well for at least one minute to ensure proper mixing.
  3. Hold the can about 8-12 inches away from the print and apply a thick, even coat.
  4. Allow the textured paint to dry for 10-15 minutes before proceeding to the next step. The surface should be tacky but not wet.

Step 3: Applying Rustoleum Sandable Filler and Primer

Once the textured paint has started to set, apply Rustoleum Sandable Filler and Primer:

  1. Shake the can thoroughly for optimal application.
  2. Spray an even coat over the entire surface of the print, ensuring complete coverage.
  3. Let the print dry for 24 hours. The result should be a rough, almost concrete-like texture that is ready for sanding.

Step 4: Sanding the Print

Once the print is fully cured, sanding is essential to achieve a smooth finish:

  1. Start with 150-grit sandpaper, using gentle, even strokes to remove the majority of the textured surface.
  2. Once the surface feels significantly smoother, switch to 600-grit sandpaper to refine the finish further.
  3. Wipe off any dust and inspect for imperfections.

Step 5: Addressing Remaining Imperfections

If any layer lines or rough spots remain after sanding, apply another coat of Rustoleum Sandable Filler and Primer. Let it dry for a few hours before lightly sanding again with 600-grit sandpaper.

Tips for Best Results

  • Work in a well-ventilated area – Rustoleum Textured Spray Paint has a higher overspray than typical paints, so ensure proper airflow.
  • Have extra sandpaper on hand – The primer tends to clog sandpaper quickly, so you’ll need multiple sheets for the best results.
  • Use a sanding block – This helps maintain even pressure and prevents over-sanding in certain areas.
  • Avoid rushing the drying process – Letting the print dry completely before sanding prevents unwanted texture buildup and ensures a smoother surface.

Conclusion

Using Rustoleum Textured Spray Paint and Sandable Filler and Primer is an excellent method for smoothing 3D prints, making them ready for painting and display. By following these steps and tips, you’ll achieve a professional-looking finish that enhances the final appearance of your cosplay or display piece. Happy crafting!

Check out our video tutorial for this amazing method!