Miniature Painting
How to Prime Miniatures (and Which Primer to Buy)
Priming a miniature takes five minutes: shake the can for a full two minutes, hold it 20-30 cm from the mini, and mist on two thin passes instead of one wet coat. Pick white or light grey primer if you'll use speedpaints, black if you're a traditional painter who wants easy shadows, and grey if you're not sure. The rest of this guide covers the details that separate a clean prime from a fuzzy one, plus what to do when it's humid out.
Why primer matters at all
Acrylic paint doesn't bond well to bare plastic, resin, or metal. It sits on top, and it rubs off the sword grip and shield edge after a month of play. Primer is a thin adhesion layer that grips the model and gives paint something to hold onto. Skipping it is the most common reason a first paint job flakes.
Primer also sets your starting value. Everything you paint afterward is influenced by what's underneath, which is why the color choice below matters more for some styles than others.
Which primer color?
| Primer color | Best for | The catch |
|---|---|---|
| White / bone | Speedpaints and contrast paints, bright color schemes | Shadows are all on you |
| Light grey | The safe default; works for almost everything | Slightly dims speedpaint brightness vs. white |
| Black | Traditional layering, metallics, dark schemes | Speedpaints look muddy over it |
| Colored (leather, red, etc.) | Batch-painting armies with one dominant color | Niche; buy once you know you need it |
If you read our beginner speedpaint guide, you already know the rule: translucent paints need a light undercoat. Over black they turn into vague dark soup. Traditional painters flip the logic, since black primer means every recess you miss is already shaded.
There's a middle path that gives you both, and it's worth learning early.
Zenithal priming (the "slap chop" everyone mentions)
Zenithal priming fakes sunlight before you paint a single color. Prime the whole mini black, then dust light grey from 45 degrees above, then a final whisper of white from directly overhead. You end up with a black-and-white model that already has lighting painted on. Put speedpaints over that and the translucent color picks up the shading underneath.
The lazy version skips the spray cans: prime black, then heavily drybrush light grey over everything with a big cheap brush. That's the "slap chop." It's five extra minutes and it makes beginner speedpaint work look startlingly good. We've watched people at paint night finish a slap-chopped mini and refuse to believe they painted it.
Spray can vs. brush-on vs. airbrush
Rattle-can spray primer is the default for good reason: fast, even, cheap, and it cures hard. Buy a hobby-brand can rather than hardware-store automotive primer, which goes on thick and eats detail. Yes, the hobby can costs more. It's also the single product where brand quality most visibly shows up on the model.
Brush-on primer exists for two situations: you live somewhere with no outdoor spray space, or you're priming one mini and don't want to gear up. It works fine; it just takes longer and shows brush strokes if you overload.
An airbrush is the best priming tool ever made and a terrible first purchase. File it under "year two."
The five-minute technique
- Wash the mini in soapy water first if it's fresh from the box, and let it dry completely. Mold-release residue makes primer bead and fisheye.
- Shake the can for two real minutes. Sixty Mississippi, twice. Half-mixed primer spits.
- Hold 20-30 cm away and spray in short passes that start and end off the model. Never stop moving while the nozzle is down.
- Two or three thin coats beat one wet one, every time. You should still faintly see the plastic color through the first pass. That's correct.
- Let it cure for at least an hour before paint. Overnight is better.
The classic disaster is holding the can too close because you want full coverage in one pass. That's how chainmail becomes a smooth bump. Thin coats protect the sculpt you paid for.
Weather actually matters
Spray primer is fussy about humidity. Above roughly 70% humidity, the solvent can't flash off properly and the finish dries rough and dusty, like fine sandpaper. Painters call it a fuzzy or chalky prime, and it ruins the smooth surface speedpaints depend on. Cold is a problem too; below about 10 C the paint goes on gluey.
The fix is patience: prime on a dry day, or prime indoors in a garage with the door open. If you do get a fuzzy prime, a gentle scrub with an old toothbrush knocks the worst of it back, and a gloss varnish coat can smooth a mild case. A bad case means stripping.
Frequently asked questions
Do you have to prime miniatures?
Yes, if you want the paint to survive handling. Paint on bare plastic rubs off at every contact point within weeks. The one partial exception is minis molded in colored "primed" plastic sold as paint-ready, and even those benefit from a real prime.
What's the best primer color for beginners?
Light grey if you're unsure, white if you're going all-in on speedpaints, black if you want to learn traditional layering. Grey is the forgiving middle: bright enough for contrast paints, dark enough to hide gaps in your coverage.
Can I use cheap hardware store primer on minis?
You can, and people do for terrain and big cheap models. On a detailed 30 mm miniature it's risky: automotive and general-purpose primers spray thicker and can bury fine detail. Save the hardware can for scenery.
How long should primer dry before painting?
An hour minimum for hobby sprays, and overnight is safer. Primer that feels dry to the touch can still be soft underneath, and a thumbnail or an eager wash will mark it.
Why did my primer come out fuzzy or grainy?
Humidity, distance, or both. Spraying in humid air or from too far away lets the primer half-dry before it lands, so it settles as dust instead of a film. Prime on a drier day and keep the can 20-30 cm out; see the weather section above for rescue options.