Painting Surfaces

On canvas, acrylic paint and oil paints are widely used. Acrylics are the most loved because they dry quickly and allow layering and blending. They are suitable for both beginners and experts. Oil paints dry more slowly, allowing artists to work on details and achieve rich, radiant colors. Many experienced artists prefer them for their depth and longevity.

The best painting surfaces are determined by the medium you are using. Stretched canvases and canvas panels are favored for oils and acrylics. Watercolor paper is excellent for use with watercolors and gouache. Whereas, wood panels have a smooth, sturdy surface for a variety of paints. Acrylic and oil paints can be used on wood panels. Before painting, make sure the wood has been thoroughly primed with gesso or an appropriate primer. 

Yes, you can paint over an existing artwork on any surface but with few precautions; sand the the surface before painting over to improve the adhesion.  Apply a primer or gesso for smoothness, to make your surface a solid foundation for your new artwork.