Impasto is a technique in which paint is applied thickly to a surface, creating a raised or textured effect.

Vincent van Gogh is known for his use of impasto in his paintings, which can be seen in works such as "The Starry Night" and "Irises".

Impasto can be used to create a sense of depth and texture, add emphasis to certain areas of the painting, and create a more realistic appearance.

An airbrush is not a common tool used in impasto painting, as it is not capable of applying thick layers of paint.

Glazing is a technique in which thin layers of paint are applied to a surface, creating a smooth and transparent effect.

Leonardo da Vinci, Rembrandt van Rijn, and Jan van Eyck are all known for their use of glazing in their paintings.

Glazing can be used to create a sense of depth and atmosphere, add richness and luminosity to colors, and create a more realistic appearance.

A palette knife is not a common tool used in glazing painting, as it is not capable of applying thin layers of paint.

Scumbling is a technique in which broken or irregular brushstrokes are applied to a surface, creating a textured effect.

Peter Paul Rubens, Diego Velázquez, and Francisco Goya are all known for their use of scumbling in their paintings.

Scumbling can be used to create a sense of movement and energy, add depth and texture to a surface, and create a more realistic appearance.

An airbrush is not a common tool used in scumbling painting, as it is not capable of applying broken or irregular brushstrokes.

Sgraffito is a technique in which a surface is scratched or scraped to reveal a different color or texture underneath.

Pablo Picasso, Henri Matisse, and Joan Miró are all known for their use of sgraffito in their paintings.

Sgraffito can be used to create a sense of depth and texture, add emphasis to certain areas of the painting, and create a more abstract or surreal appearance.