Does Primer Color Matter? A Guide to Priming Miniatures

Bare plastic, resin and metal can resist paint, so a primer is used to create a surface the paint can bond to. Skipping primer, or applying it poorly, is a common cause of paint rubbing off during handling. Primer is not simply a first coat of paint.

Grey is a middle-value, neutral starting point. It sits between black and white, so it neither darkens nor lightens the layers above it as strongly, and it is a common default when you have not chosen a deliberate underlighting scheme.

Black primer gives a dark base. Thin or transparent paints over it read darker and cooler, and recesses stay dark, which can add contrast. Opaque light colors may need more coats to cover a black base.

White primer gives a bright base. Transparent and glaze-type paints look more luminous over it, but shadows have to be added deliberately, since nothing is dark underneath. Opaque colors cover white more easily than they cover black.

Primers also come in other colors, and some painters use a dark base with a lighter sprayed highlight from above, sometimes called zenithal priming or underlighting, to establish a value sketch before the color layers. This is a technique, not a requirement, and it tends to suit thin or translucent paints.

Match the primer to the effect you want and to the paints you intend to use. Read the manufacturer's instructions for the primer's application method and drying time, apply it the way the product is designed to be applied, and let it fully cure before painting. If you are unsure, prime a spare piece first and see how your paints behave over it.