Priming your miniatures is one of the most important steps in the painting process, and one that beginners often skip or rush. A good primer coat helps paint adhere to plastic, resin, and metal, protects your work, and gives you a consistent base to paint on.
This guide covers everything you need to know about spray primer for miniatures: which colours to use, the best products, and how to prime miniatures properly without common mistakes.
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Why Priming Miniatures Matters
Acrylic paint does not bond well to bare plastic or metal. Without a primer, paint is likely to rub off, chip easily, and show inconsistent coverage. A thin, even coat of primer gives paint something to grip onto.
Beyond adhesion, primer also provides a consistent colour base. Starting on a grey or black surface is very different from starting on bare white plastic with mould lines and seam lines still catching the light. Primer unifies the model and makes painting far more straightforward.
If you are painting Warhammer models or other miniatures and skipping primer, try it once on a test model and you will likely notice the difference immediately. The paint goes on smoother, blends more easily, and the final result looks more professional.
Spray Primer vs Brush-On Primer vs Airbrush Primer
There are three ways to prime miniatures:
- Spray can primer — the fastest and most popular method for batch priming. Hold the can 20–30 cm from the model and apply thin, even coats. Works outdoors or in good ventilation.
- Brush-on primer — useful when you cannot use a spray (cold weather, indoor space limitations). Slower and requires more care to avoid brushstrokes, but perfectly usable.
- Airbrush primer — gives the smoothest, thinnest coat of all three methods. Requires an airbrush setup. Ideal for painters who want the best possible base for high-quality paintjobs.
For most painters, spray can primer is the go-to starting point. It is fast, accessible, and produces good results. This guide focuses primarily on spray primers.
What Colour Primer Should You Use?
The colour of your primer affects the entire painting process. There is no single right answer — it depends on your painting style and the colours you are working towards.
Black Primer
Black primer (such as Chaos Black) is the most popular choice for dark-toned miniatures and for painters who like a darker, moodier starting point. Shadows fill in naturally on black, and you build up highlights from dark to light.
Black primer is particularly good for: dark armour (Space Marines, Death Guard, Chaos forces), skin with deep shadows, and any model where you want the dark recesses to do a lot of the work for you.
White Primer
White primer is used for bright, saturated colour schemes. Yellows, bright reds, and light greens all look far more vivid over white. The downside is that you need to paint more carefully — shadows do not fill in automatically, so every part of the model needs paint coverage.
Grey Primer
Grey primer (such as Grey Seer or Mechanicus Standard Grey) is a versatile middle ground. It works well with both light and dark colour schemes, and it is the preferred choice for painters using Contrast paints or washes, as it gives a neutral base that does not shift colours too warm or cool.
Best Spray Primers for Miniatures
🏆 Quick Comparison: Best Spray Primers
| Primer | Colour | Best For | Buy |
|---|---|---|---|
| Chaos Black | Black | Most popular choice, dark schemes | Check price → |
| Sentinelle grise | Light Grey | Contrast paints, versatile base | Available from Games Workshop |
| Mechanicus Standard Grey | Dark Grey | Neutral mid-tone, all-round use | Available from Games Workshop |
Chaos Black — The Standard Choice
★ Top Pick
Chaos Black Spray Primer
The most widely used spray primer in the Warhammer community. Reliable, consistent, and available almost everywhere miniatures are sold.
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Chaos Black is the most popular spray primer for Warhammer miniatures and for good reason. It produces a thin, matte black base that paint adheres to exceptionally well. The formula is specifically designed for miniatures, so it does not obscure fine details the way some hardware-store spray paints can.
The finish is matte, which is important — a glossy primer would cause paint to bead up rather than flow smoothly. Chaos Black dries quickly and produces consistent results across plastic, resin, and metal models.
It is the default recommendation for painters working on dark armies (Space Marines, Death Guard, Chaos Daemons, Nighthaunt) and for anyone who prefers painting from dark to light. If you are new to miniature painting and not sure where to start, Chaos Black is the safest first choice.
Grey Seer — Best for Contrast Paints
Grey Seer is Games Workshop’s light grey spray primer, designed specifically to work as the base for Contrast paints (GW’s one-layer painting system). Contrast paints behave differently over different primers — they pool in recesses and highlight raised areas automatically, but only work correctly over a light base.
Grey Seer is also a solid general-purpose primer for painters who want a neutral mid-tone that works with both light and dark colour schemes. It is lighter than Mechanicus Standard Grey, which makes it particularly good when the final colour scheme is mostly lighter tones.
Mechanicus Standard Grey — Versatile All-Rounder
Mechanicus Standard Grey sits between Chaos Black and Grey Seer. It is a mid-toned grey that works as a neutral base for almost any colour scheme. It is slightly darker than Grey Seer, making it a good choice when you want a neutral base without committing to a full black primer.
Many painters use Mechanicus Standard Grey as their default for armies where the colour scheme has a mix of light and dark elements, or when they are not sure which primer to use.
Army Painter Primers
Army Painter makes a wide range of spray primers in many colours beyond the standard black, white, and grey. Their coloured primers are popular for speed-painting armies — if your Space Marine chapter uses a particular shade of blue or green, priming in that colour cuts out a base coat step entirely.
The quality is generally good, though some painters find Army Painter sprays more sensitive to temperature and humidity conditions than GW primers. Apply them in dry conditions at recommended temperatures for the best results.
How to Spray Prime Miniatures (Step by Step)
Getting a good primer coat is mostly about preparation and technique. Here is the process:
- Prepare your models — remove mould lines, clean off any release agent (especially on resin models), and let everything dry completely.
- Check the weather — prime in dry conditions, ideally between 15–25°C (60–77°F). Cold, humid, or very hot conditions can cause primer to go on grainy or fail to adhere properly.
- Shake the can well — shake for a full two minutes before use. A well-mixed can gives a much smoother result.
- Spray from the right distance — hold the can 20–30 cm (8–12 inches) from the model. Too close and the primer will pool and obscure detail. Too far and it will dry before hitting the model, giving a grainy ‘sandy’ texture.
- Use multiple thin coats — apply light passes rather than one heavy coat. Start and end each pass slightly off the model to avoid pooling at the edges.
- Rotate the model — prime from multiple angles to make sure you cover all the recesses and undercut areas.
- Let it dry fully — let the primer cure for at least 30 minutes (ideally a few hours) before painting. Painting over wet primer can cause issues with the paint layer.
Common Priming Mistakes to Avoid
- Priming in cold or humid weather — this causes ‘frosting’ (a rough, chalky texture). If you must prime in cold conditions, prime indoors with a brush-on primer instead.
- Spraying too close or too much — one of the most common beginner mistakes. Thick primer fills in fine detail and takes much longer to dry.
- Skipping primer entirely — paint will chip much more easily without a primer base, and coverage will be less consistent.
- Using hardware-store spray paint — it can work, but many hardware spray paints are too thick and will obscure detail. Miniature-specific primers are formulated to go on thinner.
Frequently Asked Questions
Do I need to prime miniatures before painting?
Technically no, but practically yes. Without primer, acrylic paint does not adhere well to plastic or metal, and it will chip and rub off much more easily. A primer coat is a small extra step that significantly improves paint adhesion and the final durability of your paintjob.
Can I use regular spray paint instead of miniature primer?
Some painters use automotive primer or other spray paints with good results, but miniature-specific primers are formulated to go on thinner so they do not obscure fine detail. If you use a non-miniature spray, test it on a model you do not care about first, and avoid anything too thick or glossy.
What is the best primer for Contrast paints?
Grey Seer is the standard recommendation for Contrast paints. The light grey base allows Contrast paints to pool correctly in recesses and highlight raised areas. Some painters use Wraithbone (another GW spray) for warmer tones. Avoid black primer with Contrast paints — the dark base negates much of the Contrast effect.
Can I prime inside?
Spray primers are not safe to use in an enclosed indoor space without proper ventilation — the fumes are harmful. If you cannot prime outside, use a brush-on primer instead. Some painters also use a spray booth with an extraction fan, but this requires the right setup.
How long should I wait after priming before painting?
At least 30 minutes in good drying conditions, but ideally a few hours or overnight. The primer needs to be fully cured before paint goes on top. Rushing this step can cause the primer to lift when you apply paint.
What is the best spray primer for Warhammer miniatures?
Chaos Black is the most popular choice and works well for most Warhammer armies. For lighter colour schemes or Contrast paint workflows, Grey Seer is the go-to. Both are made by Games Workshop and are specifically designed for miniatures.