Preparing a painting surface serves multiple purposes, including creating a smooth and even surface for painting, enhancing the adhesion of paint to the surface, and protecting the surface from damage.

While canvas, wood, and metal are commonly used surfaces for painting, glass is not a typical choice due to its smooth and non-porous nature, which makes it difficult for paint to adhere properly.

Priming is the process of applying a thin layer of paint to a surface to create a smooth and even base for subsequent layers of paint. It helps to improve the adhesion of paint and prevent the absorption of paint into the surface.

Acrylic gesso is a widely used primer for canvas. It is a water-based primer that dries quickly and provides a smooth and absorbent surface for painting.

Sanding a surface before painting helps to remove imperfections, such as bumps or rough spots, and create a smooth and even surface. This ensures that the paint adheres properly and provides a uniform finish.

Watercolor paint is not typically used for painting on canvas because it is a transparent medium that requires a highly absorbent surface, such as paper. Acrylic paint, oil paint, and gouache paint are more suitable for use on canvas.

Glazing is the technique of applying multiple thin and transparent layers of paint to a surface, allowing each layer to dry before applying the next. This creates a luminous and depth of color.

Oil is not typically used as a finish for protecting a painting because it can yellow over time and is not as durable as other finishes, such as varnish, shellac, or wax.

Varnishing is the process of applying a protective coating to a painting to protect it from dust, dirt, moisture, and UV radiation. Varnish can be applied in a variety of finishes, including gloss, satin, and matte.

Water is not a common medium used in oil painting because oil and water do not mix. Linseed oil, turpentine, and stand oil are commonly used mediums in oil painting as they help to thin the paint and create different effects.

Stretcher bars are used when preparing a canvas for painting to provide support and tension to the canvas, create a frame for the painting, and prevent the canvas from sagging.

Canvas is not a common type of surface used for painting murals because it is not as durable as other surfaces, such as walls, ceilings, and wood panels.

Texturing is the process of applying a layer of paint to a surface to create a specific texture. This can be done using a variety of techniques, such as stippling, scumbling, and drybrush.

Watercolor paint is not a common type of paint used for painting on wood because it is a transparent medium that requires a highly absorbent surface, such as paper. Acrylic paint, oil paint, and tempera paint are more suitable for use on wood.

Gesso primer is used when preparing a surface for painting to create a smooth and even surface, increase the porosity of the surface, and provide a barrier between the surface and the paint.