Citadel Base Paint: Celestra Grey - 12ml. Citadel Base paints are high quality acrylic paints specially formulated for basecoating your Citadel miniatures quickly and easily. They are designed to give a smooth matte finish over black or white undercoats with a single layer. All of our paints are non-toxic, water-based acrylic that are designed for use on plastic, metal, and resin Citadel miniatures. One pot contains 12ml of base paint.