A surface to paint
The most common surfaces to paint on are canvas, linen and wood. You’ll need to prime the surface with a gesso or ground to prevent the acids in the paint from contacting it directly. Acrylic gesso is easy to use and can be applied with a brush or roller.
Raw linen before it’s been sized or primed. Expensive, but has a beautiful texture, and is strong. Paper from Arches that has been sized for oil painting. A wood hardboard panel is cheap and smooth, and easy to make.