Prepping and Priming 3D-Printed Resin Miniatures: A Beginner's Guide

A crisp 3D print deserves a clean start. Maybe your miniature arrived from us ready to paint, or maybe you have just pulled a fresh resin print off the build plate at home. Either way, the few minutes you spend on prep decide how every brushstroke behaves once you get going. This beginner's guide to prepping and priming 3D-printed resin miniatures walks through the whole routine, from washing and curing to support cleanup and that all-important coat of primer, so your colour goes on smoothly and stays put.

It is the least glamorous part of the hobby and the easiest to rush. It is also the single most common reason paint goes patchy, turns tacky, or flakes off a few games later. Get the groundwork right and the painting itself becomes far more forgiving.

Start with a clean cast

Resin prints leave the printer coated in a thin film of uncured liquid resin. Paint straight over that and you are asking for trouble: it stays slightly sticky, resists primer, and can keep curing under your paintwork. A proper wash sorts it. For standard resins, a couple of minutes in isopropyl alcohol (IPA) lifts the residue; for water-washable resins, warm water with a drop of washing-up liquid and a soft brush does the same job. Work the solution gently into the recesses, then let the model air-dry completely before you go any further.

Two sensible habits while you are at it: wear nitrile gloves while the resin is still uncured, and keep the room ventilated. Uncured resin is an irritant, and a minute of care now saves a lot of bother later.

Curing without overdoing it

Once the model is washed and bone-dry, it needs a final cure under UV light to harden the surface fully. A dedicated UV station is ideal, though a sunny windowsill will do in a pinch. Moderation is the thing to watch. A short, even cure firms the resin up nicely; over-cure it and the resin turns brittle, so fine horns, spear tips and outstretched fingers snap at the worst possible moment. Cure in stages, turning the model so every face catches the light, and stop as soon as the surface loses its tackiness.

Supports, nubs and a final wipe-down

With the print cured, it is time to tidy it up. Snip the support scaffolding away with flush cutters, getting as close to the surface as you can without nicking the detail, then pare back any remaining nubs with a sharp hobby knife. A little fine-grit sandpaper or a sanding stick smooths over the small marks the supports leave behind. Go slowly around delicate areas; this is where a steady hand pays off.

Before priming, give the model one last gentle wash to clear away sanding dust and the oils from your fingers, then let it dry. Primer grips a clean, dry surface far better than a dusty one, and that 30-second step is what separates a flawless coat from a gritty one.

Priming 3D-printed resin miniatures, step by step

Primer is the bridge between bare resin and your paints. It gives the colour something to key into and reveals the sculpt's detail in a single neutral tone, so never paint a print without it. The technique that matters most is restraint: build the coat up from thin, even layers rather than one heavy pass. A thick coat fills the crispest details and pools in the recesses, which is exactly what you have just worked to preserve.

You have three sensible ways to apply it. An aerosol primer is quickest for whole batches; an airbrush gives you the finest control; and a brush-on primer is the most flexible if you have no spray setup or you are working indoors. Whichever you choose, reach for a dedicated miniature primer rather than hardware-store paint, since the pigment is finer and the finish comes out matt and grippy. We stock a range of primers and sprays in our Army Painter collection, alongside the full paints range for the layers that follow.

A few conditions make all the difference with sprays. Prime in mild, dry weather, hold the can a steady distance from the model, and avoid cold or humid air, which causes that chalky, frosted finish nobody wants. Grey is the safe all-rounder, black helps with shadow-heavy schemes, and white lifts bright colours. Let the primer cure fully before your first layer of paint: an hour or two usually does it, longer in damp conditions.

From primed to painted

That is the whole routine. Wash, cure, clean up the supports, wash again, prime. It sounds like a lot written down, but in practice it is twenty unhurried minutes that transform how your miniature takes paint. Once the primer is dry, the fun begins, and a well-prepped surface makes even a first attempt look the part.

Need something to practise on? Our highly detailed prints are made for exactly this. Browse characterful, paint-ready sculpts in the Galaad Miniatures and Twin Goddess Miniatures collections, stock up on brushes and colours from our paint sets, and you have everything you need to take a miniature from raw resin to finished centrepiece. Got a specific model in mind? We print to order too, so just get in touch and we will sort it.