Best Airbrush Primer (2026): Vallejo, Stynylrez and AutoBorne Compared

Vallejo describes Surface Primer as the first color layer of a model: it preserves the smallest detail and improves adhesion of the colors applied over it. Its primers page rates it for resin, PVC, brass, white metal and wood, says to apply it in several layers, and says it forms a homogeneous film of strength and resistance within a few hours. Use it directly or diluted with Vallejo Airbrush Thinner or Flow Improver, at around 15 to 20 psi, and clean up with Vallejo Airbrush Cleaner.

Prepare the part the way Vallejo's Model Air chart describes: wash it with neutral soap so the surface is degreased before priming. The black suits dark schemes and zenithal highlighting; the white suits bright colors.

Badger's Stynylrez is sold as a water-based acrylic polyurethane primer that levels itself and dries to a hard, flat finish on plastics, metals, wood and resin (per the Amazon listing). Badger's Patriot 105 listing names Stynylrez among the materials that airbrush sprays. The three-tone set gives white, gray and black in 4 oz bottles.

The drawback is information. When we checked on Nov 8, 2026, Badger's website said it was still under renovation and showed no product or data sheets, so there is no maker figure for thinning or pressure to quote. If you use it, start at the bottle, spray light coats and test on scrap. The listing also warns that the primer can become unusable if it freezes, so avoid ordering it into a cold-weather delivery.

AutoBorne is Createx's sealer-primer: the starting ground coat for hard surfaces in its basecoat and clearcoat process, and the most adhesive coating Createx makes, per its hard-surface guide. The data sheet lists aluminum, plastic, fiberglass, wood, 3D print materials (PLA, ABS and nylon), urethane resin, ceramic and polycarbonate, and says it can go directly onto any substrate except silicone. For metal, Createx says to use a 2K epoxy or urethane direct-to-metal primer.

Thin it with 4011 Reducer at 5 to 10% (up to 20% through an airbrush), let it sit 10 minutes, and spray through a 0.5 mm or larger tip at 25 to 30 psi or more. Createx says it covers opaque in two or three coats and can be recoated in 5 to 10 minutes. Scuff the surface with 400 to 800 grit and wipe it clean first.

The data sheet's times are for 70°F and 50% relative humidity: let each coat dry matte before the next, and allow 20 to 30 minutes before Createx paint goes on. There is no recoat window, so color can follow at any time without scuffing. Rinse the airbrush with warm water and 4011 between colors, and use 4008 Restorer as the final clean.