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Assembling the Siege Assault Battle Group: Tips for a Smooth Build

Assembling the Siege Assault Battle Group: Tips for a Smooth Build

By GUNNZO | Published: 2026-08-19

Category: How-to Guides

Master the assembly of the Horus Heresy Siege Assault Battle Group with expert tips on preparation, painting, and building your Legiones Astartes force.

The Horus Heresy Siege Assault Battle Group is a formidable force for any Warhammer 30k collection. Assembling this box set can be a rewarding experience, but it requires careful planning and the right techniques to ensure a smooth build. Whether you're a veteran hobbyist or new to the Legiones Astartes, these tips will help you create a stunning army.

In this guide, we'll walk you through the essential steps for assembling your Siege Assault Battle Group, from preparation and tools to painting and finishing. We'll also highlight some useful products from GUNNZO that can enhance your building experience.

Preparation: Tools and Workspace

Before you start assembling your Siege Assault Battle Group, it's crucial to set up a clean, well-lit workspace. Organize your tools and materials so everything is within reach. A good pair of nippers, a hobby knife, and plastic cement are essential. For cleaning up mold lines, a file or sanding stick will save you time later.

Consider using a cutting mat to protect your table and a parts organizer to keep pieces sorted. This is especially helpful for a large box like the Siege Assault Battle Group, which contains multiple vehicles and infantry units. Proper preparation ensures you can focus on the build without interruptions.

  • Use a dedicated hobby mat and good lighting to avoid mistakes.
  • Keep a parts organizer to sort sprues and pieces by unit.
  • Have a damp cloth or paper towel handy for cleaning excess cement.

Choosing the Right Paints and Brushes

Painting your Legiones Astartes is where your army comes to life. For a cohesive look, choose a color scheme that suits your legion. The Citadel Base paints are a great starting point. For example, Citadel Base: Death Korps Drab 12ml provides a muted green perfect for Death Korps of Krieg, while Citadel Base: Naggaroth Night 12ml offers a deep purple ideal for traitor legions.

Citadel Base: Naggaroth Night 12ml
Citadel Base: Naggaroth Night 12ml

When painting, use a good quality brush set and consider using a wet palette to keep your paints moist. For metallic details, a fine detail brush is essential. If you're airbrushing, you might prefer Mr. Color Spray S47 Gloss Clear Red 100ml for a smooth finish on vehicle panels.

  • Prime your models with a suitable primer to ensure paint adhesion.
  • Thin your paints with water or a medium for smoother application.
  • Use a wash to add depth to recesses and panel lines.

Assembly Techniques for a Smooth Build

When assembling your models, follow the instructions carefully, but don't be afraid to modify for dynamic poses. Dry-fit parts before applying cement to ensure a good fit. Use plastic cement sparingly to avoid excess glue that can mar details. For larger models like tanks, consider sub-assemblies to make painting easier.

For infantry, clean mold lines with a file or scraping tool. Use a chisel for precision work on flat surfaces. If you're adding custom details, green stuff or similar putty can help fill gaps. Remember to let each joint dry completely before moving to the next part.

  • Dry-fit parts to check alignment before gluing.
  • Use a file or sanding stick to smooth out mold lines.
  • Build in sub-assemblies for easier painting of hard-to-reach areas.

Painting Your Legiones Astartes

Once your models are assembled, it's time to paint. Start with a primer to give your paint a good grip. For a classic Space Marine look, use a base coat of your chosen color. The Citadel Base range offers excellent coverage. For example, Death Korps Drab is perfect for a gritty, militaristic look, while Naggaroth Night adds a regal, sinister tone.

Layering and highlighting are key to a professional finish. Use a smaller brush for edge highlights and a drybrush for texture. For vehicles, consider using a spray paint like Mr. Color Spray S47 Gloss Clear Red for a glossy finish on red panels. This can add a striking contrast to your army.

  • Apply thin coats of paint to avoid obscuring details.
  • Use a wash to shade recesses and then highlight raised areas.
  • Seal your models with a matte or gloss varnish to protect the paint.

Enhancing Your Build with GUNNZO Products

At GUNNZO, we offer a wide range of products to support your Warhammer hobby. For your Siege Assault Battle Group, consider using the Warhammer 40000: Combat Patrol: Death Korps of Krieg to expand your forces with additional infantry and vehicles. This box set complements the Siege Assault theme perfectly.

If you're looking to add a unique touch to your models, the Gundam Marker - Fluorescent Pink GM14 is excellent for adding glowing details on plasma weapons or energy shields. For a quick finish, the SD EX-Standard #005 Unicorn Gundam (Destroy Mode) is a fun build that can serve as a display piece alongside your 30k army.

  • Use a fine-tipped marker for precise details on small parts.
  • Consider adding a display piece like the SD Unicorn Gundam to showcase your collection.

Assembling the Siege Assault Battle Group is a rewarding project that can be completed smoothly with the right preparation and techniques. By following these tips and using quality products from GUNNZO, you'll have a stunning Legiones Astartes force ready for the tabletop. Explore our range of Warhammer products to find everything you need for your next build.

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