Matisse Acrylic Medium MM10 - Gesso 250ml. MM10 provides a high-quality, long-lasting primer for canvas, board, or paper. It creates a smooth, vibrant white surface, perfect for easy paint manipulation. Gesso is suitable for creating a surface for both acrylic and oil paints. When priming for acrylic paints, two coats of gesso are recommended to ensure complete coverage. For oil paints, it is advisable to seal the surface first with MM5 Matt Medium or MM12 Clear Sealer, and then apply a minimum of 3 coats of gesso. As the oil in oil paints is readily absorbed by the gesso, a stronger sealed layer is needed to ensure the paint does not absorb through the gesso and onto the actual canvas. It is recommended that MM10 Gesso be applied with a spatula or blade on canvas. If applying with a brush mix with equal parts water, especially for the first coats when being applied to raw canvas/linen (alternatively use MM27 Low Viscosity Gesso).