Priming 3D Prints Lecture

Introduction

• Speaker: Frank
• Topic: Priming 3D prints for a smooth, glossy finish.
• Context: Part of a series on painting and finishing 3D prints.
• Focus: Tips, tricks, and techniques.

Challenges in 3D Printing & Finishing

• Many variables affect the outcome:
  • Type of paint and primer used
  • Environmental conditions (hot/cold)
  • Method of application (distance of spraying, shaking the can)
• Importance of experimenting on test prints.

Types of Primers Tested

• Automotive Primer:

  • Typically for metal but works on plastic.
  • Provides a fine surface for painting.

• Filler Primer:

  • Builds up and fills gaps and layer lines.
  • Risk: Can hide fine details.

• Plastic Primer:

  • Designed specifically for plastic.
  • New to the presenter, interested in results.

• Sandable Primer:

  • Smooth finish, used frequently by the speaker.
  • Allows sanding even with fine grit sandpaper.

• Flat White Rust-Oleum Primer:

  • Denser than sandable primer but less than filler primer.
  • Good coverage, useful for covering different paint colors.

Demonstration Outline

1. Sanding and Surface Preparation:

   • Previous tutorial on using an electric palm sander.
   • Importance of prep work: clean and smooth surface.

2. Painting Environment:

   • Ideal conditions: air-current, dust-free, well-ventilated space.
   • Use of proper protective equipment like masks.

3. Application Techniques:

   • Read the back of spray can instructions.
   • Efficient spraying techniques (distance, light coats).
   • Handling paint runs and fixing them.

4. Potential Issues:

   • Adhesion problems due to oils or unclean surfaces.
   • Imperfections visible after priming.

Practical Testing Results

• Automotive Primer:

  • Smoothest finish, not great for filling layer lines.

• Filler Primer:

  • Effective in filling gaps but can clog sandpaper quickly.

• Plastic Primer:

  • Specific texture and adhesion properties.
  • Not highly effective in filling gaps.

• Sandable Primer:

  • Great for creating a smooth surface.
  • Needs multiple coats for best results.

• Flat White Primer:

  • Covers different colors effectively.
  • Provides a rough finish but sands down smoothly.

Conclusion & Further Tips

• Importance of Prep Work:

  • Clean prints, effective sanding, and multiple coats if necessary.
  • Avoiding imperfections early is crucial for a quality finish.

• Experimentation:

  • Testing different primers and techniques to see what works best.

• Resources for Learning:

  • Detailed tutorials available on specific techniques.
  • Discord community for advice and discussions.

Upcoming Content

• Next videos will cover painting techniques and using different types of paint finishes (gloss, satin, metallic).

Summary

• Priming is a crucial first step in achieving a smooth, quality finish in 3D prints.
• Various types of primers have different effects on the print surface.
• Proper preparation and experimental techniques can significantly influence outcomes.
• Further tutorials will discuss painting, clear coating, polishing, and buffing.

Additional Resources

• Link to Discord for more tips and community support.
• Patreon link for supporting the creator.