Guide · 6 min read
Zenithal priming: one spray, instant shading
Prime black, spray a lighter color straight down from above, and every raised edge on the model already catches light before you've mixed a single color. It's the fastest head start a paint job can get.
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Zenithal priming is a miniature-painting technique that primes a model dark, then sprays a lighter color from about 12–18 inches directly overhead. Raised surfaces catch that second coat and stay pale; recesses stay dark underneath it. The result is a rough highlight-and-shadow map on the model before any actual paint goes on.
Zenithal priming vs. drybrushing
The two get mixed up because they both leave raised areas lighter than recessed ones — but they happen at opposite ends of the job. Zenithal priming is the first thing that touches the model, straight over bare plastic or resin, and it's a spray that lays down a genuine gradient of paint. Drybrushing is a finishing pass, done with a nearly dry brush over color that's already there, and it catches texture rather than shading the whole form. A model can get both: zenithal first for the light map, drybrushing at the end to pick out edges and detail.
What you need
How to do it
- Prime the whole model dark. Full, even coverage — this is your shadow color, so any gaps here show up as gaps in every recess later.
- Let it dry fully. A rushed second coat over wet primer pools and ruins the surface you're about to shade.
- Hold the model so light would naturally fall on it from above — on a base, upright, the way it'll actually sit on a table.
- Spray the lighter color from directly overhead, in light passes. Start further away than feels necessary; it's much easier to add more than to fix an oversprayed model.
- Check the recesses stay dark. If shadows are filling in with the light color, you're spraying too close, too much, or from too shallow an angle.
Spraying from the front instead of from above. A front-on spray just makes a lighter model — it doesn't create the light-source illusion, because the light source it implies is a lamp in the viewer's face, not the sun overhead. Angle matters more than distance.
What the extra step actually costs
It's an extra pass and a dry cycle before you've painted anything, which feels like a delay. What it buys back shows up later, especially if you're painting with quick methods like Contrast- or Speedpaint-style paints, which are built to pool in recesses and thin out over raised detail — exactly the map a zenithal base already gives them.
| Step | Flat-primed model | Zenithal-primed model |
|---|---|---|
| Priming | One color, one pass | Two colors, two passes |
| Highlights before painting | None — flat color throughout | Already roughed in across every raised edge |
| Basecoat/wash layer | Needs its own highlight and shadow work after | Reads with depth as soon as one thin layer goes on |
| Best paired with | Hand-blended layering, full control | Contrast, Speedpaint, and other quick-paint methods |
Times vary by model size, spray equipment and how many light passes it takes to get even coverage — treat the numbers above as relative, not a stopwatch reading.
When to use it, and when to skip it
Zenithal priming is one tool in a bigger kit — see the rest of it in the painting guides hub, including a straight comparison of wet blending vs. layering for anyone planning full hand-blended highlights instead.
Use it when…
You're batch-painting a squad or an army and want speed. You're using Contrast, Speedpaint or another paint-and-wash method that relies on the model already having depth. You want a gritty, high-contrast look — zenithal reads especially well on armor, vehicles and anything with hard angular surfaces.
Skip it when…
You're planning full hand-blended highlights and want to control every transition yourself — a strong zenithal base can fight with careful layering instead of helping it. You don't have a spray booth, airbrush or well-ventilated space; rattle cans and airbrushes both need one.
Questions people ask about zenithal priming
Can I zenithal prime without an airbrush?
Yes. A rattle-can spray primer in a light color works — you just get less control over how fine the light-to-dark fade is than an airbrush gives you, since a rattle can only really offers one spray pattern.
What color should I zenithal prime?
Black to white is the standard pairing and gives the widest tonal range. Black to grey gives a softer, more muted result. Some painters spray a three-stage black-to-grey-to-white gradient for even more range before any paint goes on.
Does zenithal priming work with Citadel Contrast or Army Painter Speedpaint?
Yes — it's one of the most common combinations. Those paints are formulated to pool color in recesses and thin out over raised detail, so a zenithal base gives them a shading map to work with instead of a flat surface.
How far away should I hold the spray?
Roughly 12–18 inches for a rattle can, held straight overhead. An airbrush can work closer with a more diluted mix. Start further back than feels necessary — you can always add another light pass, but you can't take an oversprayed coat back off.
Does this work on both plastic and resin miniatures?
Yes, the process is identical. Make sure the model is fully and evenly primed dark first — resin in particular needs a clean, mould-release-free surface for primer to grip properly.
What if I mess up the zenithal pass?
Reprime the model dark and do the zenithal pass again. It's paint over plastic or resin, not a finished piece — a bad spray coat costs you a primer bottle and twenty minutes, nothing more.
Plan the paint scheme before you spray
Upload a photo of your primed miniature — zenithal or flat — and get a full paint scheme, a step-by-step guide, and a printable PDF back.