Technique guide · 7 min read
What is non-metallic metal (NMM) painting?
Fake a suit of armor's shine using flat paint instead of metallic flake — the technique that separates a showcase model from a tabletop army, and the one that photographs cleanly under any light.
No card. PaintMini's Expert tier plans NMM schemes automatically.
Non-metallic metal (NMM) is a miniature-painting technique that renders armor and weapons using ordinary matte paint instead of metallic pigment. The illusion comes from value contrast alone — light and dark areas placed to mimic a single light source, plus one sharp specular highlight. It takes roughly 3 to 6 times longer than a metallic basecoat.
NMM vs. true metallic paint
Painters new to the hobby often assume NMM is a fancier version of a metallic basecoat. It isn't — they're solving different problems.
True metallic paint contains actual metal flake, so it reflects real light and looks convincing from across a table with almost no extra work. NMM paints the idea of a reflection using flat color, which takes longer but gives you full control over the light source, the color temperature, and how the piece reads in a photo — metallic flake tends to grain up and go flat or blotchy under a camera flash or studio light, which is exactly where NMM holds up.
What the technique actually involves
- A single, consistent light sourceEvery metal surface on the model reads highlights and shadows from the same direction — pick one before you start and don't change it partway through.
- A mid-value base coatUsually a cool grey-blue for steel, or a warm brown for bronze and gold — this sits in the middle of the value range you'll build out from.
- Broad shadow blockingA darker value laid into the areas facing away from the light, blocked in with a soft-edged brush rather than blended pixel by pixel.
- Stepped highlightsProgressively lighter values built toward the light-facing edge, each one smaller than the last.
- Sharp specular highlightsSmall, high-contrast dots or lines at the point closest to the light — the single detail that sells "metal" over "plastic" or "cloth."
Side-by-side comparison
| True metallic paint | Non-metallic metal (NMM) | |
|---|---|---|
| Time per area | One basecoat, one wash, done | 3–6x longer — base, shadow, multiple highlight steps |
| Photographs | Can grain or flatten under flash | Reads sharp and consistent under any light |
| Skill floor | Forgiving — hard to get visibly wrong | Unforgiving — a wrong value reads instantly as a mistake |
| Best suited to | Full armies, tabletop-ready units | Single showcase models, competition entries |
How to paint it, step by step
Fix the light source first
Decide where the light is coming from before you touch a brush. Everything after this step is just following that decision consistently across every metal area on the model.
Block in the mid-value base
Cover the whole metal area in a single mid-tone — grey-blue for steel, warm brown for bronze or gold. This is the value everything else builds from.
Lay in the shadow shapes
Paint a darker value into the areas facing away from your light source. Keep the shapes broad and geometric, not soft gradients — metal reflects in blocks, not blends.
Step up the highlights
Add two or three progressively lighter values, each one covering a smaller area than the last, working toward the point closest to the light.
Place the specular highlight
Finish with one small, sharp, high-contrast highlight — near-white or the brightest color in your palette — right at the point the light would hit hardest. This single mark does more than any blending underneath it.
The mistakes that give it away
NMM fails in predictable ways, and all of them come from treating it like skin or cloth instead of metal.
- Smooth, blended transitions. Skin and cloth blend softly between values. Metal doesn't — it jumps between blocks of value with harder edges. Over-blending is the single most common reason an NMM attempt reads as plastic.
- Too small a value range. If your darkest shadow and brightest highlight aren't far apart, the surface won't read as reflective at all — just flat and grey.
- An inconsistent light source. Highlights pointing different directions on different parts of the same model is the fastest way to break the illusion, even if each individual area looks fine on its own.
When to use it and when to skip it
NMM is a deliberate trade of time for control. Reach for it when the payoff justifies the extra hours; skip it when it doesn't.
- Use it on a single display or competition model, when you want a specific stylized light (a red glow, a torch-lit scene), or when the piece will mainly be seen in photos rather than across a gaming table.
- Skip it on a full army you need finished this month, or anywhere true metallic paint's quick basecoat-and-wash will read fine at arm's length.
- Try it alongside object-source lighting (OSL) if the model already has a light-emitting element — the two techniques share the same value-control skill and often appear on the same piece. See the OSL guide for the companion technique.
PaintMini's Expert tier — 10 to 15 colors per scheme — plans NMM alongside OSL, wet blending and freehand as part of the same rendered guide, so you get the value steps mapped out before you pick up a brush. Edge highlighting uses the same stepped-highlight logic on non-metal surfaces, and the full painting glossary covers every term this page uses in one place.
Questions painters ask about NMM
What does NMM stand for in miniature painting?
Non-metallic metal — painting a metal surface using ordinary matte colors instead of metallic paint, so the reflective look comes from value contrast rather than metal flake in the pigment.
Why not just use metallic paint?
Metallic paint is faster and forgiving, and it's the right choice for most models. NMM takes longer but gives full control over the light source and photographs more consistently, which is why it shows up mostly on competition and display pieces rather than full armies.
What colors do you use for NMM?
A mid-value base — grey-blue is standard for steel, warm brown or gold for bronze — plus a darker shadow value and two or three progressively lighter highlight values, finished with one small near-white specular highlight.
How long does NMM take compared to metallic paint?
Roughly three to six times longer per area. A metallic basecoat and wash might take ten minutes; the same area in NMM, with shadow blocking and stepped highlights, often runs thirty minutes to an hour depending on size and detail.
Can a beginner learn NMM?
It's not a beginner technique — it depends on comfort with value control, which usually comes after practicing basic layering and edge highlighting first. Most painters try NMM after they're already confident blocking shadows and highlights with regular paint.
Is NMM the same thing as object-source lighting (OSL)?
No, though they're closely related. NMM fakes a reflective metal surface under an external light source; OSL paints a surface as if it's being lit by a glowing object on the model itself, like a lantern or a power source. Both rely on the same value-control skills.
How do I fix NMM that looks flat instead of metallic?
Widen the value range — push the shadow darker and the highlight lighter — and sharpen the transitions between them instead of blending smoothly. A single small, high-contrast specular highlight at the brightest point usually fixes a scheme that reads as flat.
See an NMM scheme mapped out for your own miniature
Upload a photo of your primed model and PaintMini's Expert tier plans the value steps — base, shadow, highlights, specular — before you commit paint to plastic.