How to Prepare 3D Printed Models Before Painting

Preparing your 3D printed model properly is one of the easiest ways to improve your painting results.

Whether you've just received a custom 3D printed miniature or printed one yourself, preparing it correctly is the secret to achieving an outstanding paint finish. Skipping the preparation stage can result in poor paint adhesion, visible print lines, or details being hidden beneath thick layers of primer.

At Megathorium Models, we specialise in high-quality 3D printed miniatures, terrain, cosplay props, gaming accessories, and hobby supplies. Whether you're new to the hobby or an experienced painter, we're always happy to share our knowledge and help you get the very best from your projects.

Need advice before you start? Give our friendly team a call on 01621 220590 or visit our shop at Unit 12a Mayfair Industrial Estate, Maldon Road, Latchingdon, Chelmsford, CM3 6LF. We'd love to help with your next project.

Why Preparation Matters

Unlike traditional plastic kits, 3D printed models often require a little extra preparation before painting. Taking the time to clean, smooth and prime your model will:

• Improve paint adhesion

• Preserve intricate details

• Produce a smoother finish

• Help your paints perform better

• Make your finished miniature look far more professional

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If you're unsure which products are best for your model, pop into Megathorium Models and speak to our experienced team. We stock quality paints, primers, brushes, tools and accessories to suit every hobbyist, and we're always happy to offer free advice.

Step 1: Remove Support Marks

Most 3D printed models require supports during printing. Once removed, small marks or nubs may remain.

Use a sharp hobby knife or precision side cutters to carefully remove any remaining support material. Take your time—rushing this stage can damage fine details that make your miniature unique.

If you'd rather leave the preparation to the experts, ask us about our custom printing services. We can advise on preparing your prints for the best possible finish.

Step 2: Clean the Model

Cleaning your model removes dust, oils and any remaining residue that could prevent primer from sticking properly.

For Resin Prints

• Wash with Isopropyl Alcohol (IPA)

• Allow the model to dry completely

• Ensure it has been fully UV cured

For FDM Prints

• Wash gently in warm soapy water

• Rinse thoroughly

• Leave to dry naturally

Never begin painting while moisture remains on the model.

Looking for cleaning products or hobby essentials? Visit our shop where you'll find everything you need under one roof, from hobby tools to premium paints and accessories.

Step 3: Smooth Any Imperfections

Even the highest quality 3D printers can leave small layer lines.

Using fine-grit sandpaper or sanding sticks (400–800 grit), gently smooth obvious imperfections while preserving the sculpted detail.

For larger terrain pieces, modelling filler can help eliminate gaps before sanding.

Remember, perfection isn't always necessary. Many small layer lines disappear completely once primed.

Step 4: Assemble Your Model

If your model arrives in multiple parts, dry-fit everything before applying adhesive.

For resin prints, use a quality super glue.

Avoid plastic cement, as it's designed specifically for injection-moulded plastic kits.

Not sure which adhesive is right? Our knowledgeable team can recommend the best products for your project, whether you're building miniatures, terrain or cosplay props.

Step 5: Prime Your Model

Priming creates the perfect foundation for your paint.

A good primer:

• Improves paint adhesion

• Creates a consistent surface

• Enhances fine detail

• Helps prevent chipping

Choose your primer carefully:

• Black – Great for darker colour schemes and metallics.

• White – Perfect for bright colours and Contrast-style paints.

• Grey – A fantastic all-round option.

Always apply several light coats rather than one thick coat.

At Megathorium Models, we stock trusted hobby brands including The Army Painter and The Colour Forge, helping you achieve professional results every time. If you're unsure which primer is right for your project, just ask—we're always happy to help.

Step 6: Inspect Before Painting

Once the primer has dried, inspect your model under good lighting.

Primer often highlights imperfections that weren't visible beforehand.

If required:

• Sand rough areas

• Fill any remaining gaps

• Re-prime affected sections

Professional painters often spend almost as much time preparing a miniature as they do painting it—and for good reason.

Ready to Start Painting?

With your model properly prepared, you're ready to begin painting.

Whether you're creating an army for tabletop gaming, a competition piece, a display model or a custom character, good preparation makes every stage of painting easier and produces far better results.

If you're looking for premium paints, brushes, basing materials or hobby tools, visit Megathorium Models in Latchingdon. Our store is designed for hobbyists, and we're always happy to chat about your latest project or recommend the right products.

Looking for Custom 3D Printing?

Don't own a printer? No problem.

Megathorium Models offers professional 3D printing services for:

• Miniatures

• Tabletop terrain

• Busts

• Cosplay props

• Armour pieces

• Replacement parts

• Bespoke commissions

Whether you already have a digital file or just an idea you'd like to bring to life, we'll work with you to create a high-quality finished print.

Give us a call on 01621 220590, email us at info@megathoriummodels.co.uk, or pop into our workshop to discuss your project. We'd love to show you what we can create.

Visit Megathorium Models

We're more than just a hobby shop—we're a community for gamers, painters, makers and creators.

Visit us for:

• Expert hobby advice

• Premium paints and tools

• Official hobby brands

• Custom 3D printing

• Gaming accessories

• Cosplay prop fabrication

• Friendly service from people who genuinely love the hobby

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Whether you're just getting started or you've been painting miniatures for years, you'll always receive a warm welcome.

Visit us at Unit 12a Mayfair Industrial Estate, Maldon Road, Latchingdon, Chelmsford, CM3 6LF, call 01621 220590, or browse our website to discover our latest products, services and upcoming events. We look forward to helping with your next hobby project!

Final Thoughts

Preparing your 3D printed model properly is one of the easiest ways to improve your painting results. A little extra care at the beginning makes painting more enjoyable and ensures your finished miniature looks its very best.

If you have any questions about preparing, printing or painting miniatures, don't hesitate to get in touch. Whether you need expert advice, quality hobby supplies or a bespoke 3D print, the team at Megathorium Models is here to help every step of the way.